I hope trail apps fit in this discussion group

For boondocking with your rv or other vehicle I’d suggest looking at rv sites that specialize or at least include that option, I occasionally see them referred to in overlandung FB group posts where boondocking is mentioned as one feature of some rv apps. Fwiw anyplace an rv can camp legally isn’t wilderness.

Another approach is find which national forests or BLM lands you’re interested in and look at their forest or region website for their OHV dispersed camping maps and regulations.

For ex here’s Inyo National Forest’s start page for Off Highway (unpaved road) Vehicle use.

www.fs.usda.gov/activity/inyo/recreation/ohv

Also for over 62 the Senior Access Pass has a 50% discount in national park campgrounds: brought my previous summers per night cost in Yosemite to $12 per night.

In White Mountain NF in NH it was $11…

ETA: here’s a recommended paper book state specific for inexpensive camping of that sort.

www.facebook.com/100044323005153/posts/pfbid02uoYZGZyPgPiLneUFZjXk6vaDo3nUDvVPqCt9XETFV34BdbJf8Bz9od9LdbvwyBA8l/?mibextid=cr9u03

And that FB page’s cheap camping guide:
rvlifestyle.com/free-cheap-rv-sites-camping/#How_to_find_free_or_cheap_RV_campsites_in_National_Forests_and_Grasslands

AND one thing they point out is in a lot of the less populated parts of America cell service is spotty to nonexistent and paper is at the least a good backup. I can attest to that: in Yosemite there was one turn on the road to the campground that had minimal signal: nowhere else in the high country. In New Hampshire there was zero signal anywhere near the White Mountain NF campgrounds I stayed at. In Glacier my only choice was a Canadian cell service that carried “international roaming” charges of $1 per mb (!!!! Yes, MB, do that math…) Ditto the northern reaches of Vermont and NH.

Oregon state parks along the coast offer some spectacular camping locations. No idea what they now charge. But New York State’s in the Adirondacks are okay imho at $18-$20 per night.

What you're looking for doesn't exist. The sheer number of locations and search criteria is mind boggling. Those apps you mentioned are making "special places" harder and harder to find. I use All Trails, Avenza and Google Earth myself, but they're tools, not a concierge service.

Thanks for the input everyone. For some reason I'm not being notified via email of responses. So I checked back today and found all of these great posts.
High Sierra Fan, Is that senior pass you mentioned something I can get online. Just had my 64th birthday last month and that was a great bit of information.
To clarify my intentions for some who asked, I plan on taking road trips with my rooftop tent and dog. Mixed in with some trail, (backpacking), access campgrounds for some tent camping. Probably not straying too much from the Western states at first. Not afraid of doing some 4 wheeling to get there.
Gonna check out Avenza now.
ErnieW, I just ordered an InReach Mini2 yesterday and I'm still a little foggy on how to integrate it with my phone, Garmin watch, and the available maps. Gonna have to go to Youtube school I guess.
Thanks Again Everyone.

vanderloo I looked back at my own profile and under Edit Profile I find Notifications. There is a section where you can ask the forum to send you immediate notice when a new post is made in a thread you follow. That is the only way I know to get an email notification. Unless I'm missing something, which is very possible.

I ended up getting mine at Great Sand Dunes NP because the listed offices near me weren't issuing them (or even answering their phones) in the summer of 2021.