RE: Gun or bow?
Depends on the animal. There are very few elk that live outside of Riding Mountain National Park (where no hunting is allowed) during the bow season and it's pretty cold to use a bow during the rifle season (although it is legal).
Bear hunting over bait lends itself to bow hunting so that's a natural choice. Deer hunting is difficult in bow season due to the large amount of bush and multiple food sources available. Combine that with the relatively low deer density and it makes for a difficult bow hunt. So i prefer to use the rifle during deer season, but plan on using the bow if I have time and can scout properly.
Moose hunting could be done with bow if a person has enough and was good at calling them in... but I don't have either haha.
That's my $0.02