I guess we're not as particular as some. We just go with the flow. We've full-timed for 16 years and traveled constantly. We've stayed in the major national parks...all without reservations and perhaps a handful of WalMart-type stays of our choosing, not because we couldn't find a spot.
We have found that campgrounds do not reserve every single spot. Plus, there are campgrounds in national parks that don't even take reservations such as is in Yellowstone and Grand Teton. Those are the kind of places we enjoy.
We are self-contained and have solar so we don't need any hookups. In fact, the most scenic places don't have hookups. We also avoid interstates. We have found some wonderful city and county parks in small towns. Public parks are always our first choices - national parks, national forests, state parks, etc. We also love boondocking on public lands.
I can see if you have 1-2 weeks of vacation time you'd want to make reservations although we didn't when we were younger. If your time is not structured, traveling without reservations is very easy to do.
We travel early in the week and find our spots by Thursday. Sunday or Monday we'll take off again.
For the major summer holidays, we never stay where there is any kind of water around - lakes, rivers. We find a nice quiet campground and let the weekend warriors have their fun. We go to their places after the holidays.
There have been many times where we've taken off in the morning with only a directional plan but no destination. It's a very relaxing way to travel - for us anyway.
Full-timed for 16 Years
. . . Back in S&B Again
Traveled in a 2004 Newmar Dutch Star 40' Diesel