That should be a great trip, Jon.

As far as the two key questions here are concerned, I think I'm just adding to the emerging consensus in suggesting that you A) NOT check the bike as baggage with the airline, but rather aim to have shipped via bikeflights (generally well-priced), and B) take the Miyata 1000, assuming it's a good fit (let a true touring bike fulfill its purpose!)

The number of times I've seen evidence of egregious abuse when picking up items checked in with various airlines (including 'special handling' items such as guitars) compares unfavourably with my experience in having bikes/frames and other large items shipped by courier. I'm distrustful of commercial airlines' baggage handling practices as a result.

A large bike box, lots of foam pipe insulation, extra cardboard, great care and attention to detail in packing, and a little faith in the shipper should get you your best chance at trouble-free cross-continental transport. Ship to your hotel in SD...or others haven mentioned BF'ers who might facilitate?

Echoing others' demands for pics here on the Forum, when possible.

Edit: Shipping to Fedex location, as suggested by gugie also a good option!