"Basic" GPS won't accept custom routes, you have to get a higher priced unit to do that. When looking at a prospective GPS that has most of the features you want, go to the manufacturer's website and locate that GPS. There should be some tab headers there that say Overview/In The Box and Specs. Open the Specs tab and scroll down to see if that unit will accept custom routes. Mine (Garmin Nuvi 765T) will display 10 at a time
Then it's just a matter of plotting your route on a program (such as HD Ride Planner
) and then uploading the route to your GPS and making sure it's preferences are set correctly.
If you can't find a GPS that you like in your price range that will do that, then you will have to work with a combination of your present GPS and an analog GPS! (map)
Here's a good resource for finding campgrounds
along the way.
I live 1 1/2hrs north of you and can make it down to Nashville in one long day, riding the slabs. Other wise, think 2 nights/3 leisurely days camping