I'm looking for an Android app that has a compendium of all available BLM land maps and motor vehicle use maps to use offline.

This year, I was able to selectively download road use maps for each specific national park to get maps of BLM roads to campsites and camping restrictions, but they weren't complete and it was difficult to know exactly where I'd be and grab them ahead of time. I was also able to get area-wide BLM maps for specific areas - Moab, primarily, but they'd be helpful elsewhere.

Is there any bulk PDF that I can import into Avenza with the whole West US in that map form? Or a pack to grab from within Avenza with all of the geolocated PDFs. Or maybe even an app that downloads the maps and works offline?

I'd pick up one of the atlases that have all of the maps on them, since I can read paper maps fine, but I really like the fact that Avenza shows my location on the map using GPS.

What do you guys use?