I've traveled during BF with both DDs. Advice of PPs is great. Also wanted to add that if you are flying be sure to read the TSA updates on "liquids" and print a copy to have with you. You never know when you are going to run into an uninformed TSA agent. Always best to have that policy handy.
If you let the hotel know that you need the fridge for medical purposes they often won't charge you for it.
Bring lots of ziplock bags. I would stash my horns in them if I had to pump at the airport, in my car, or somewhere else where I didn't have time or facilities to clean them. I also would put the pumped milk into BM bags, and put a few bags into a ziplock (in case of a leak I wouldn't lose that milk). I'd also put ice in the baggies too (use hotel ice machine or restock with ice from a restaurant at the airport).
Be diligent about pumping on time and for enough time. Heck, add an extra session if you can. Pumping full time for a few days is just not the same as BF so being diligent can a)keep your supply up and b)keep you from getting a plugged duct or mastitis. That's the last thing you want to have happen when traveling.
ETA: in all the times I traveled, and it was almost always for 4-6 days, I never had a problem reconnecting with DDs. They were great with DH and taking a bottle, but happy to resume our nursing relationship when I returned.
Mom to two amazing DDs ('07 & '09) and a fur baby.
Gluten free since Nov '11 after non-celiac gluten sensitive diagnosis. Have had great improvement or total elimination of: migraines, bloating/distention, heartburn, cystic acne, canker sores, bleeding gums, eczema on elbows, dry skin and scalp, muscle cramps, PMS, hair loss, heart palpitations, fatigue. I'm amazed.