The K-framed S&W model 28 Highway Patrolman 6" is a great gun, my father and I shoot his quite often using .38 specials loaded with semi-wadcutters. It's a lot cheaper to practice with .38 specials and step up to .357 for hunting purposes. As far as +P .38's, unless there is some great bargain price on them, I'd just go with .357's instead.
As for small game hunting, .38's will work on game up to hog-sized, but I've seen a few hogs get mad and charge after being bonked with a .38, where the .357 load would usually put them down on the first shot.
I've been trying for years to get him to sell me that revolver, but he absolutely refuses, insisting that the only way I get it is through inheritance. He loves that gun more than any of the others.
Good shooting, great hunting.