If you are going to introduce grizzlies, you need to allow hunting. Hunted animals are generally more skittish of humans. Maybe just official state hunters until they establish, but getting shot at regularly will help.

I personally am not in favor of re-introducing grizzlies to the lower 48. If they want to increase numbers there seems to be plenty of very remote, not used land still in Canada and Alaska.

The large group size seems to be the best protection.

OM- is Phat still on the forum? He has done lots of backpacking in grizzly country.