You did your best - Set a reminder, Logged in moments before reservations opened, and Yosemite Valley was already sold out before you could blink.
You're not alone. Campgrounds at America's most beloved parks are routinely booked solid within seconds of opening. But here's the thing most people don't know: cancellations happen constantly. Every single day, people cancel reservations at "impossible" campgrounds — and that's where campsite monitoring apps come in. In fact, our analysis showed that 1/3 of summer reservations at Upper Pines in Yosemite are made last minute.
I want to review Campflare, Campnab, Arvie, and Campsite Tonight. They all watch for cancellations, but they work very differently — and those differences determine whether you actually get the campsite or just get a notification too late to act on it.
Here's an honest breakdown.
Camping Cancellations are hard to snag
When a campsite cancellation opens up at a popular park, it can disappear in seconds. When you get cancellation alerts from recreation.gov for a Yosemite Valley summer campsite, there are thousands of others who are also receving the alert. Most apps send you an alert and then leave you to race back to Recreation.gov to complete the booking yourself. By the time you read the notification, open the app, navigate to the right page, and click through checkout, someone else already has it.
Campflare: Free and Fast
Best for: Campers who want free alerts with really broad coverage and are ready with lightning quick clicking fingers. Clicking on a very fast alert work for pretty much every campground, except the most competitive campgrounds.
Campflare is the BEST free option, and it's really good at what it does. It's sent millions of alerts and powers the campsite notification feature inside Hipcamp, and others. It is still the gold standard when I hear from power campers and my users. It scans popular campgrounds as often as every 15–45 seconds and sends notifications the moment a site opens up.
The pitch is explicit: democratizing access to public lands. No paywalls, no tiers, just free notifications.
The catch: when Campflare sends you an alert, you still have to book the site yourself. You get a notification, you scramble, you hope you're faster than the other campers who also just got the same notification. At peak-demand campgrounds, that race is brutal.
Pricing: Free
Alerting experience: Alert only — you complete the booking yourself
Platforms: iOS, Android, Website
Scanning Speed: AMAZING - I think it may be faster than recreatin.gov sometimes!
Coverage: AMAZING - National Parks, State Parks
Campnab: The OG Paid Service
Best for: Regular campers who want reliable SMS alerts and don't mind the race to book
Campnab has been doing this since 2017 — longer than any other app on this list — and has the track record to show for it. They probably lost more earned media than I may ever gain!
Like Campflare, though, Campnab is an alerting service. When it finds a cancellation, it texts you — and then you need to go book it yourself. The company is transparent about this: "Campnab only alerts you to the cancellation."
Pricing: $10 / month to $270 / year
Alerting experience: SMS alert — you complete the booking yourself
Platforms: Web-based
Coverage: 3,200+ parks across the US and Canada, including backcountry permits
Arvie: Human Agents Who Book For You
Best for: Campers who want someone else to handle the whole thing, especially RV travelers
Arvie takes a fundamentally different approach: instead of alerting you, it employs live agents who complete the booking for you the moment a site opens — even at 3 AM, even on holiday weekends.
The flagship feature is called AgentBook. When you set up a scan, Arvie's team watches for openings every 1–2 minutes and books the site directly into your account using your credentials on the booking website. You don't have to do anything. You just get a confirmation that you're booked.
The platform covers 4,700+ campgrounds and 269,000+ campsites, and Arvie claims a 65% success rate on cancellation scans — a number they describe as far ahead of any competitor.
The RV-specific filtering is a notable differentiator: Arvie lets you filter by rig length, hookup type, amp service, and pull-through availability, so agents only book sites that actually work for your setup.
Pricing: Free to start; $19 per successful AgentBook booking, or $59/year Pro
Alerting experience: Agents book it for you — you get a confirmation
Platforms: Web-based
Coverage: 4,700+ campgrounds across the US and Canada
Campsite Tonight: Auto Add-to-Cart
Best for: Campers who want the speed of automation without giving up control of their own booking
Campsite Tonight takes a different approach than either alerting or human agents. When a cancellation opens up at a National Park, the app automatically adds the campsite to your cart — giving you a 15-minute exclusive hold on the site while you complete checkout at your own pace. The self checkout is the point, it keeps you in control of the booking experience since your plans could have changed.
The app scans every 20 seconds, making it one of the fastest monitoring systems available. It covers National Parks, National Forests. It also covers some state parks, county parks, and private campgrounds. It's geographic coverage is by the far the worst of the four.
Pricing: $59/year for premium
Alerting experience: Automatic add-to-cart with a 15-minute hold — you complete checkout
Platforms: iOS and Android
Coverage: Recreation.gov, state parks (alerts only), county parks (alerts only), and private campgrounds across the US
Side-by-Side Comparison
The campsite availability problem isn't going away. Parks are more popular than ever, reservation windows are competitive, and cancellations are the only reliable path to last-minute access. The question is what happens in the seconds between a cancellation and a booking. Choose the app whose answer matches how you want to camp.