I am thinking, with some friends, to go backpacking and camping into the Denali National Park backcountry. I have been told there is a train from Anchorage to the park entrance and upon registering etc. one takes a twice-daily bus deep into the park wilderness.

Is there anybody who has had experience with this? Could you provide suggestions and possibly share experiences? And finally, how much time should be budgeted? I imagine I could spend weeks just wondering around...

Any help is appreciated!