Normal
Most likely your tour operator will give you the option of leaving bags in storage. The bags will then remain on the bus in the locked storage area. Unfortunately there are no longer lockers available in US airports. I also suggest you try and take the bare minimum in an overnight size bag to bring to you room each night of the tour portion. I didn't do this and soon came to regret it. I found that while in Alaska there really wasn't anywhere we were not able to go to in blue jeans, it is very laid back.
