Campnab solves a very specific problem. There’s limited supply at province/state/national campgrounds. As such, some people hoard sites, only intending to use a few of their reserved days. (This means campgrounds are often sold-out within minutes of being made available.) Then, they cancel the ones they aren’t using, at the last minute.
The problem with this is that many campsites go unused. If you want one of those campsites, the only way to get it is to refresh the availability page repeatedly—in hopes that a spot will open up.
This is what my friend’s wife was effectively doing, when they couldn’t find an available campsite. So, he put Campnab together to automate the process. We later opened it up to others.
We could probably do lots of other things with it. For now, though, we’re just keeping this small and simple—with hopes that it help frustrated campers find a campsite.