I've never been there so I couldn't say either way but I can tell you that the blackies here can get very big.
That being said, a .270 is just fine for taking one.
150 grain Partition, Interlock, just about anything really, and you have no worries... if 130 grain, go with a premium round.
Put the bullet in the boiler room, same result....dead bear.
Good luck to your friend !!