Recently, we were trying to find an available camp site on SEPAQ during the summer. We were late to the party, though, and most (interesting) sites were already booked or had single days left here and there.
Finding the remaining sites at flexible dates is actually quite cumbersome since you need to go to each camp site (and click through a calendar week by week there) or go to a single spot of a camp site to see its availability calendar. This is especially cumbersome if you are flexible in terms of the dates and the park.
Long story short, I looked at how to get the availability of the camp sites and hacked together a scraper. It recursively finds all camping spots and downloads the availability for each of them. Once they are downloaded it can parse them and filter for available spots (with minimum days and a desired date range).
You can find the code here: https://github.com/mschoettle/sepaq-availability-scraper
There’s definitely some things that could be improved but it got the job done.