I carry a Diaper Sling bag its made by Skip-Hop and its a cammo design, it holds 2 betterdry diapers and a pack of wipes or 3 Diapers and a small travel pack of wipes. Its light weight and has proven to be the best diaper bag I have used. I keep a larger back pack in the car with spare diapers wipes and a complete change of clothes as a just incase.
I used the sling bag on out last trip to Disney world and it worked out great as it was easy to carry and was a non issue on the rides