Since he has little experience with handguns, and choosing the right handgun for someone else is difficult, maybe try this- if you have access to different revolvers or semi autos, or if you can get him to a range to rent different handguns, have him try some out. Stick to .357 mag or above for revolvers and 9mm or above for semi autos. See what feels best to him and what he shoots better. Try full power loads not target level loads.
If he ever needs a handgun for bear defense, it must be drawn and shot quickly and accurately, with a round designed for penetration. Defense situations for bear present different angles and target areas than hunting bears.
How he carries his handgun impacts how quickly he can get it into action. Have him try different methods to ensure the draw will not interfere with his fishing equipment.
