Hi consultant and welcome to TA-AK, I've noticed you have several questions/threads posted regarding your AK trip. Most posters/readers on the AK forum prefer that you contain all of your questions in one thread (keeps things neat/organized) and readers aren't looking elsewhere for info. &/or repeating themselves.
Why don't you take a minute and tell us about your trip, who's traveling, timeframe, likes/dislikes, etc. and everybody can start from there.
I too would not recommend using Cantwell as a base for Denali shuttle in the morning.
Carlo Creek would be a closer choice.