I don't know anything about the Emory but if it were me and I made the apt I would keep it.
An hour drive reading a book or taking something you can do that you enjoy the will fly by before you know it.
The wheel chair folds up just put it in the car no biiggy who knows they may have valet parking and can help you or they may even have their own wheel chairs you can use. I would call and ask what accommodation they have.
You can still continue with your other doctor why not? All your doing is going for a consultation and peace of mind.
You mention chemo treatments is whatever you had them for under control.
I have an apt with a Neurologist next month and my primary DR put me on the garbapentin.
This is new to me too with it at this extent of numbness, burning, and the whole nine yards.
I should have thought something about it years ago when I think it was starting slowly.
Like you I am a Diabetic I thought my sugars were fine but the more I read I know they weren't. my A1cs ranged throughout the years as 6 7 even an 8 last year.
Like now my feet on top burn a little I keep busy or get a blue bag from the grocery put ice In it and put my feet in that. It really helps most of the time unless it's really bad then nothing is going to help.
I wish you luck at the Emory I hope they can help you.
I hope my opinion helps a little and gives you peace of mind,