UPDATE
My riding partner was a little paranoid, so he fed exed the bikes from his company to our hotel. He slow boated it. No problem, hotel held onto the suitcases. Bikes were fine and un desterbed. After talking to several other riders doing the same ride (Seattle to Vancouver), we decided to try and take the bikes with us on the plane ride home. We were flying Alaska. From Seattle to Burbank, Ca.

We got the the airport checked in, the bags were tagged and weighed, we then took the bags to the TSA area where they check in oversize luggage, animals and firearms.
The people at the Alaska baggage desk said they couldn't guarantee that our bags wouldn't be opened and that going directly to the TSA was the only way to go.
The TSA was very helpful! Opened our suitcases in front of us, scanned the bags, put a tag in the bags, locked them up and took them to our airplane.

It was about another 30 minutes but worth it. I didn't pay for an oversize bag because the bag/suitcase weighed under 50lbs.

I don't know if they would be as helpful as other airlines but this was quite easy.

My biggest concern was to have missing peices or a cracked frame.

I hope that this information helps any other TE travelers!!