Nice to hear from you, CarolS.
I'm not real experienced on fulltiming but the first thing I would do (if you're old enough ) is to get a Senior Interagency America the Beautiful pass - here's the link to their website http://www.nps.gov/findapark/passes.htm. You have to be 62 - which is a time of rejoicing for many of us - but as a senior, you'll pay 50% at most of their campgrounds which include corp of engineer campgrounds. I can't get to their link to all the sites - but all I know is my favorite camping site is a corp of engineer campground & I love using it (costs me $10 instead of $20/night). Also you can get this at many federal recreation sites. I couldn't find mine when I wanted to see the grand canyon. The lady at the entrance said it was cheaper for me to buy another one (at $10) than to pay the entry fee. It was quick & easy.
The other thing that has helped me on trips is Allstays camping app (i use it on my iPad - but I see it is also available for PCs). I believe Liz recommended it quite a while back. it allows you to scout out possible campgrounds - you can look for something close to where you are or you can move it to the area you hope to be in by evening. It has a link to recommendations by campers (which also shows what they paid), a brief description of the campground & a link to their website (if they have one). It costs 9.95 but was well worth it.
I boondocked on my last long trip some -usually at truck stops. While I have a generator, if it was hot enough that I needed a/c, I opted for a campground instead & used their electricity. What was pretty neat in some states was they had dumping stations at rest areas. KS doesn't, but MN & WA did. Not sure about other states.
The more experienced crew will chime in shortly... but maybe these ideas help a little.
Oh & by the way, GTG means Get Together - Check out the Get-together category & see if you can meet up with some of these fine ladies. We have one in KS in Sept if you're interested.
Good luck with the fridge and don't be a stranger. This group can answer most any question you can come up with.
Take care, Catherine