You will find that combining multiple sites is better than just relying on a single site. For planning I use Good Sam and Coast to Coast and Passport America to find destinations. On the road I like RVPARKY because of the real time GPS locates where you are and identifies campgrounds nearby and on the route. I only make reservations at destinations and never for overnight stops. We start looking on RVPARKY around 2 or 3 pm for a CG on our route to be off the road by 4 or 5pm. The app gives all pertinent information to call to check availability and have one held for you. It also has filters for military campgrounds, gas stations, Cracker Barrel, Cabella's etc. It's free to download and I find it easy to use.