Likewise. Camping used to be spontaneous up until Covid. We might book a popular site a few weeks in advance but only for popular ones on holiday weekends.

Now they can be booked months in advance when you've no sense of how available you'll be or what the weather will be like.

For Michigan's booking system, people also game it by booking long stays that finish on the dates want (thus getting around the "within 6 months" booking window) and then cancelling down to the dates they want for a paltry cancellation fee, given how in demand they are.