Cause I might be dead by then... Or, be under medical treatment, and have DR. appointments (which as about as hard to get as campsites), or have home emergencies. Not having a regular job obligation any more, we have no idea where we will be or what we will be doing a year from now. But, we do have some reservations for campsites that are a year out, that are planned. One campground that we are booked at, all campsites are booked a year out, usually within a day of whenever reservations open.
We just got back in from a site that we stayed in for five months, full hookup, for free, courtesy of our National Park Service.