@ruggles
Although I'm not qualified to answer your question, I don't believe that activity is going to cause more extensive damage. Good question for your doctor. Back in the day when my feet were so painful I used to walk as much as I could. The extent of that walking was going into the mall and walking halfway through. I am not very active and that has done far more damage then whatever happened with my neuropathy. I read walking regularly can decrease pain although I'm not sure I buy that based on my experience however I suppose it could have been worse if I didn't walk but it helps strength. Be careful though since Neuropathy can affect your balance and if you have numbness check your feet regularly. I recently had a small stone in my shoe which I didn't feel. I believe your feet and legs are a good indicator of when you're had enough.
Take care,
Jake