[QUOTE=mebert72;1021770]I bought a camera backpack (Kata 3N1-20) just for our trip this past January and it worked out great. There was plenty of room for the camera (DSLR), a few lenses, spare batteries and even space left over for two small water bottles. Even though there was plenty of space for everything, the pack was still small enough to easily carry through the park and rides.
This specific case can be used as a full backpack or a sling. I used it as a sling the entire trip, which made access to the camera extremely fast.[/QUOTE]
My DSIL has a DSLR and she uses the same type of backpack/sling. She loves it. We carry a pocket size digital camera, easier for us to always have on hand for the kids, but I would seriously consider doing the DSLR in a backpack.