We rarely make reservations when on the move although we do call ahead about noon to make sure there is room at our preferred stop for the night. We have encountered areas, where construction projects have all the commercial campgrounds full. In that case, we look to state parks or other public parks as they rarely allow long term stays.
For longer stays, we rarely make reservations more than a few days to a week in advance. In the past 10 years it seems that more and more National Forest campgrounds are ending their seasons on Labor Day and actually closing rather than just shutting off the water and locking the bathrooms where they used to allow camping after the facilities were shutdown. With the advent and constant improvement in computer technology, more and more parks are going to automated 24/7 reservation systems and it seems more public parks are moving to all sites being reservable with very few or no walkins. In the past two years we have encountered Corps of Engineers Parks where we could only get a walkin for 1-2 days (the length of the reservation window).
The great amount of information available on the internet has made finding campgrounds easier. While I appreciate the rating systems that several sites offer, it has had consequences for those that may like a certain park. In the past two years, several of our favorite parks in a number of states that have been consistently mentioned on forums like this one and highly rated on the review sites have been book solid for weeks at a time. In one case, a small park not far away that did not have a website and was not listed on any of the popular directory or review websites was virtually empty. In another case, a county park that only has electric and water and does not take reservations was also no where near full.
We have noted some campgrounds sold for development in popular tourist areas of Florida. We have also noticed that some membership parks like Encore and Escapees now allow nonmembers to stay. Some Encore parks even participate in the Passport America Discount Club program. It is my understanding that the membership only park in Dutch John, UT is now open to the public. Business models continue to evolve and change.
Safe travels!
Trailertraveler