Are researations needed most of there time anymore?

Here in Arizona during the fall and winter months full timers horde the campsites. CG rules state a maximum stay of 14 nights in the same site. When the reservation system opens for a given period they'll book another 14 night stay and move their rig to the new site. Several told me they have an app that auto books them at midnight when the reservations open for the time frame they need.