My answer is ALWAYS the same: "It's easy, take your wet bag and your clean diapers with you and while you change the baby simply place the dirty diapers in your wet bag and at the end of your vacation bring them home with you. The only thing you are changing in your day to day life while cloth diapering is the fact that you are putting the used diapers in your wet bag and not in the trash can. If you are using our service diapers while you are on vacation just set them out for pick up on the next delivery day after you get home. If you are using your own diapers, I recommend that the first thing you do when you walk in the front door is put the diapers in the washing machine and start your normal cloth diaper wash routine. Simple!!!"
In my family we travel A LOT...at any given time all three of us or just one of us is gone traveling for up to 2 weeks at a time on a family vacation or for work. We always try to travel together whenever possible, which means no matter where we are going I have to take our cloth diapers, wipes, and our wet bag. I have flown with our diapers, dirty and clean, taken week long driving trips in southern California and been gone for work for up to a week and a half, all while travel with my son and his diapers. It is possible to go ANYWHERE at ANYTIME with your cloth diapers. I will admit that traveling with service diapers (you are using a diaper service) is easier just because you are able to just set the diapers out for pick up after you return and not even have to worry about cleaning them. Personally it doesn't bother me to wash my son's diapers after a trip as long as I remember to put them in the washer as soon as I get home.
During on of our recent trips to San Diego I took some pictures of how I travel with our diapers.