Welcome Hipshot,
The more the merrier. Glad you found this site, as you have already found, there is a bunch of most helpful folk residing here.
I found the bumps to not be a problem, but curves were a different matter. Take them slow, and brace yourself against them. And the reclining seat is a big help, as are the pain meds prior.
I had an hour drive and was able to stop and pick up prescriptions.
I am only 5' 4", and have a small van. You will need extra leg room as you have to keep that leg out straight, and you need a little room to squiggle around some. But definitely no problems travelling.
Check back here for any and all problems or questions you may have. Welcome aboard.
Glenys
LHR 5/28/09
RHR 7/23/09