I know that Isle Royale is accessed via ferry, but is there public transport to the mainland ferry terminal? Please note that the OP has no car! Unfortunately, very, very few national parks in the US can be reached by public transport. Yosemite is one of the few.

Edited by OregonMouse (11/28/11 02:35 PM)
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey