Ted,
I highly recommend flying out of Bishop whenever you have a chance.
But always call Rod in advance and ensure he will be towing when you
are there. He does have a charter service too and if no one calls he
likes to go fishin'. But he provides good service, if expensive, and
has O2 service as well.

I have found over the years that Bishop is a great entry point to the
White Mtns. and then off to the north or south or both. We like to
camp up in the Sierras where it is cool and spend a week or two at a
time.

Highly recommended.

John