
I am sure that you can find someone (especially some of the good Juniors) who will run your dog for you while you show her if moving her is a problem for you.
I too have a disability and fellow exhibitors and judges have been very good, and I just have to remember to tell the Steward that I cannot see much, so that judge doesn't do the regal point thing.
Other exhibitors forgive me for running up on top of them, and yell warnings at me when I get too close to the ropes. Few judges get the hump if my line to them is out or I end up practically in their lap on the run back ;)
I would go to ringcraft yourself and perfect your handling and increase the rapport in the Ring with your girl and I am sure you will have more good results when your friend can't help out.