Pride Mobility

I have taken a look at many scooters for my father and I will say the Jazzy scooters are really well built and IMO the way to go if you are looking for one of these things. They have a very wide selection based upon needs. My dad still likes the outdoors and misses the hiking experience. Jazzy has a 4 wheel drive ATV scooter which is actually fun to drive yet still meets insurance standards for payment

http://www.pridemobility.com/scooters/wrangler.asp

They have regular scooters as well, but I have less experience with those and there are many places that make scooters for that purpose.