Don't paint it. Your food will be cooked on paint. I would use an SOS pad and scour the hell out of it. Heat it up and re-oil. Store it in a dry place from now on.
I can't believe you camped in that meadow. Clearly not vehicle friendly. There have been boulders blocking access to it for years.
Not a durable camping surface.
Looks like you had fun though.
My 2cents...
Cd is nice to listen to library copy's of audio books.
A USB is great to connect iPod, but will not charge an iPad.
Small buttons are a pita. Make sure it has a remote. Easier to adjust while moving.
CDs skip on washboard roads. Deal with it.