This summer a COE park I encountered said they (COE campgrounds) all require reservations now, even if there are plenty of empty sites staring you in the face. And you have to phone the government reservation line, you can't book the site at the campground office. I considered this a ridiculous rule, refused to reserve and left. While I was able to find quite a few available USFS sites, most of those now take reservations and many were booked up even though empty (No one seems to enforce the "must occupy site first night" rule. My personal opinion is that USFS sites should be reservable only on weekends and should be FCFS on weekdays.