Princess Alaska tour coaches

Do the coaches Princess use for the land portion of their Alaska cruise tours have over head storage or is the only space under the seat in front of you? i am specifically referring to the coaches used between Anchorage and McKinley lodge and from McKinley lodge and Denali Lodge.

Underseat space minimal, similar to airlines. Vaguely remember small overhead storage, for jackets, etc. You're encouraged to bring fairly small carry on.

I failed to mention, any larger luggage is stored beneath you on coach.