Short barrel 12 guage pump with tritium night sights. Load up the tube with 00 buck for the first "panic" shot (bit of spread, more likely to hit), then 3 slugs to really lay it on.
You can rack rounds with a pump WAY faster than with a bolt. A slung 12.5" shorty is handy and easy to carry. If you miss, you don't have to worry about the round hitting a random camper a mile and a half off.
For hunting, an M38 or M44 is a great choice in the bush. For everyday carry/bear protection, a pump 12 guage is a better choice.
If you have $$ to throw at it, a good 45/70 lever in a short "Guide Gun" configuration would be my second choice. A pre Remlin Marlin Guide Gun, or one of the many custom/small manufacture ones out there (be prepared to pay... a lot... for one of those) is a go-to choice for a lot of northern outfitters who have to contend with Polar Bears - which are considerably bigger and tougher to drop than even grizzlies.
That's my opinion, there are many others.