Thanks for the good advice and ideas everyone.
After one year, we are nearly finished with our upgrade project. We spent a few hours a month on it and it is ready for travel and camping.
When we bought it, the floor boards were dry-rotted and the
scamp needed lots of work.
Some upgrades were: new floorboard, new rear window, new
tires, new chrome hub caps, new laminate flooring and trim, new cabinet doors, new
tail lights, new curtains, fresh coat of
paint, and TLC.
Here are some photos: