I know of no shrouded hammer 44 mag revolvers.
However, if he can afford it, smith and wesson offers a scandium frame model of the smith model 29 that might be perfect for him as a back packer. I think it runs about $800. It is very light.
Personally, Id rather opt for a 10MM Glock, unless I was going to Alaska. THe 10mm has great penetration and is roughly equal to a 41 mag in power. If you pick the Glock 20, it has 15 rounds in the mag too.
The only negative is 10MM round is not on every gun store shelf.