Garrett Hardin -- he of the Tragedy of the Commons -- addressed the question of disabled access to wilderness. He opposed it.

Hardin suffered from polio, contracted before WWII, and walked using braces and crutches for the rest of his life.

While I cannot find an online reference to that view, it's one he visited multiple times in his essays, collected in several books: http://www.powells.com/s?kw=garrett+hardin&class=