Ok...In Nebraska...i was shocked on our family camping trip how many reserved spots sat empty...the campground was 100% booked and reservation tags on every site...i have seen this many times over the years and i cant figure out why the state parks do not put in a policy where if you are not there within a certain time your spot becomes available...im not talking a car or camper was on the site...i mean the whole weekend and all 5 days i was there no one ever showed up...i walked around and checked reserved stickers and dates and i bet 50 spots were complete no shows. You have a 48 hr window to cancel and get a refund however these spots were never made available to drive ups and they stayed empty. I would think the parks could double their money if they said be here by a certain time or lose your spot....i get some people may arrive a day or two late for whatever reason but to not show at all is crappy for drive up people who want to camp but cant because a spot is reserved even though it sits empty the whole time. Again there was no camper or cars on any any of these spots but the reserved tags were there showing the dates. I have tried to ask and never get a answer other than they paid for the spot so it cant be taken even if no one shows up....pretty dumb i think.