I will be going to Denali in early June with a group which includes two elderly - but still fit- relatives. We are all big wildlife watchers, and want to go for walks( up to 1 hr) but not tough hiking. This will be our only chance to go to Alaska & Denali. I am deciding between 2 days on the shuttle bus or one day shuttle with one day tour bus. Because we want to learn about the area & animals i thought a tour may be more informative, what do you think?