We took two major trips this year, the Everglades and Glacier Nation Park in western Montana.
In Florida, we stayed at a few State and private CGs and had no problems with our 25 ft. Dutchman. However the first question from the CG was “How big is your rig”. This was in February/March so I suppose it was near the peak season. There is definitely limited spaces for the bigger rigs but they could “plug” us into almost any available spot.
Coming down through KY, TN and GA we had no problems except finding an open CG open in winter.
Our trip to Glacier National Park was a bit more problematical. Again we were at the height of the season ( July/August) and the National Park CG sights suitable for RVs are by reservation. You can check in to see if the reservation was filled and camp that day if it is open but there are no guarantees that the party that reserved the spot would not show up a day late.
Outside the Park, CG space on the eastern side is at a premium and we found our 25 footer wedge between two Motor Coaches. We had to position our TT so we could open our door when the MC’s slides were out. Even though we had reserved 4 day in advance, the CG put us and a few other TT in with the Big Boys so to speak.
The CGs outside the western side of the Park were much better and less crowded. The lesson we learned is; during the peak season you not only have to reserve in advance, you have to have a understanding of the size of the spot you have reserved. When it gets busy, they will pack them in.
We drove through the National Park CGs and they are rustic, one has to check to see if the campground you wish to reserve can even accommodate your size TT.
Interestingly enough, those CGs that are the most remote and deepest into the wilderness, are only accessible by foot and accommodate tents. Either you are afraid of bears or you are not.
So plan well and check into details.