I went with Cargo Golf for a travel bag.
Cargo Golf and Golf Guard Golf Travel Cases by Doskosport
You use the bag as your travel bag and your golf bag. It has wheels and a shoulder strap. It is a hard case.
I don't know about you, but when I travel, most of the time I use a cart. This is a much better bag to use for a cart, due to the hardshell, but I have walked 3 rounds with it without a problem.
I went with the 500 which is just too small. All your clubs fit, but it is a BITCH to make them fit with the clubhead covers. Also, your shoes don't fit in the bag. So you have to have your golf shoes in your bag with your clothes. Which sucks for space because I usually only have a smaller travel bag and I want to use that for just clothes. With size 13 footjoys in there, there isn't a lot of room for anything else.
Now Golfsmith is selling the 700 for $110. I would go with the biggest size you can afford.
The best part of these bags is that they ARE your golf bag and take up the same trunkspace as a normal golf bag. My friend travels with his hardcase, but most of the time it won't fit in our rental car's trunk. Then if he takes out his bag, it doubles all the space you need.
The downside is that they are a little clunky to carry on the course. That and it isn't "your bag".
If you take a cart often on trips, and you are diligent about moving EVERYTHING from your normal bag to the CG, and remembering where you put it, then there are no problems with it really. Except the shoes which I'm sure the more expensive models address.