We travel with 2/3 dogs at any given time. Maddie needs to be crated b/c she'll pee on something while we're gone (don't ask how I know this...). We leave the radio on a music station when we leave them alone, and yes, we put bark collars on the little dogs. The boxer only barks if there's a good reason. We also have an x-pen with off the ground camping beds for when we're hanging around outside.
If you don't have a lot of patience, don't get a dog. If you want a loving travel companion, go for it! I'd suggest a small to medium sized dog, for convenience sake (under 45 pounds).