Many of you will recall a while back I pointed people to this website:
<http://www.ultimatecampgrounds.com/uc/index.php/2012-10-03-01-10-22>
This Ultimate Campgounds site is an invaluable resource for anyone that
camps like we do, away from the crowd.
In addition for the small fee he charges you can download the entire thing
in a big spreadsheet and then load it into your GPS or mapping programs
like Streets & Trips.  I break it down into separate files by campground
type and use it in S&T and on my Garmin GPS.  Works great.  And wow, 20K+
entries!
In recent email exchanges with the owner and builder of Ultimate
Campgrounds I asked it he had any plans for an Android app (having seen
that there was an iPhone/iPad app available).  He said that he really
wanted one but the person helping him had run into problems.  So I asked
his permission to appeal to the VW community on his behalf and he said sure.
So, if someone can help (compensation if any to be worked out between you
and him) contact Ted at  ted@ultimatecampgrounds.com .
Don't bother to email or respond to me, I can't help :)