Alan - I have a 336M (the first model year's designation for the 336SS) and a 1894P, with my eye on an 1894SS as my next purchase. For your purposes, I'd take the 1894SS. The 44 mag is a very flexible cartridge w/respect to bullet types and wts, plus you can shoot .44 spcl's out of it. For bear, you want big, heavy bullets. Federal 300 gr Castcores cycle fine in my 1894, and it is abt the heaviest commercial loading you can find that's not too long to cycle in a lever gun (tho I've not tried the Buffalo Bores)
I gotta say, tho, that you are really overly concerned abt the whole Pa bear thing. A bear sighting, let alone a charge, is HIGHLY, HIGHLY unlikely while you're hanging about the woods. Because of the nature of my research, I have spent more than a few summers, or parts of them, with more outdoor time than indoor time all over the U.S. At times those were in places fairly thick with bears (like Denali NP, Yellowstone NP, Kodiak Isl., the Alaskan bush) and I have too seldom even seen bears. Shoot, one of my research sites in W. North Carolina was home to a problem bear from Shenandoah NP that had been relocated there, and in three years neither I nor my students ever saw him once (tho he did destroy some of my equipment). I've had research gear destroyed by griz in AK on more than one occasion, but again never saw a bear at that particular spot. Some of my AK friends have been bluff charged, but never attacked. And a bluff charge may end w/in feet, not yards - you just never know. Shooting would be a last resort, and only justified at very close range (a few yds) at a charging bear. If you read accounts of folks attacked by bears, lots of them never had (or if armed would have had) time to fire a shot anyway (attacked at dark, in thick brush, non-frontal attack, etc.)
Rather than bears, my most nerve-wracking encounters have been with other angry or jittery critters - specifically moose, bison, musk oxen and a stampeding herd of caribou I met head-on in a narrow gully while they were being chased by wolves one winter. Now THAT was frightening. Honestly, I almost never worry abt bears.