HI DebraOak --- how did your July trip go?
I set out on my new van's "Maiden Voyage" on July 12 and had great fun for about a week in Northern California in Lassen Park area. I'm a 57yo woman, been doing boondocking road trips for over 30 years, in smaller vehicles. I rarely camp in campgrounds as I find them noisy and often full. Sometimes I do stay in them as it can be pleasant when there's actually space and there are few other options. But boondocking is a lot of fun! I believe that there are tips on how to find boondocking sites on this website.
Boondocking can be quite unpredictable and sometimes one has a harder time finding a site than other times.
What I recommend is what I am starting to do, which is to begin keeping notes from your travels, as you explore them w/ an eye to boondocking. This is a different way of looking at the landscape, and you'll notice different things. I recommend bring along a GPS device and write down the coordinates of any sites you find where you end up camping, for future reference.