Robie & ddavis ask all the questions you need to and don't let ANYONE tell you differently. First off this website is only your first point of search results and a great starting point. However don't let people who "THINK" they know everything tell you differently.
I'm an Alaskan bush...
Sorry to hear about your hunt but glad you and your Dad shared quality time together. As a pilot myself in Alaska I hear all the good and bad stories about the Transporters and Air-Taxi Services up here and have been called several times for advise.
As far as moose rutting grounds I know of...
Here is a hunt I did with a canoe and you can see how mobility was key to our success . With weight being key for fly in hunts your raft is probably the only option.