The 100 lbs bear is a cub and likely will have a Mom around and that’s a far worse scenario than a 400 lbs bear alone. All bears in the continental US outside of the northern Rockies are going to be black bears in any event.
More of a problem is critters like raccoons, porcupines, etc..... Hikers on the Appalachian Trail in Vermont were plagued for years by porcupines that would steal leather hiking boots left on the floor of a shelter. They liked the salt in the boot. What fun waking up and finding a boot missing !.
I just watched a YouTube of a truck camping couple up in British Columbia had a porcupine eat the wiring on the bottom of the truck, caused a Check Engine light and failure while about 70 miles from the nearest paved road. They had tools to fix, but what a PITA.