Like @EYJONAS! mentioned. I was in some of that country last weekend and had a griz at about 40 yards.
Isnt my first time seeing them in that country either. You spend enough time up there you bound to run into them.
I personally wouldnt be comfortable without bringing a firearm with me.
If the you like the Beartooths, and they fit you well, Check out the timberlines. I was in the same situation as you having one of there heavier boots but wanting something lighter with no insulation. Picked up a pair of these and they fit the bill nicely,