On my last trip (last December), I carried a Nikon D3000 with 18-55mm lens and a 55-200mm in the bag in case I needed it (I rarely did, but it did come in handy because I was there on the first day that Rapunzel's tower was up and I got some zoomed in pics of it). I also carried a small Sony Handicam for capturing stuff in motion. All of this was in a rather small camera backpack (Targus brand, about 14" tall and 10" wide).
I'm headed to DLR in just over a week and will be carrying all of the above *plus* a 50mm prime lens, a handful of filters, a lens hood (stupid me forgot it last time), and a very compact monopod (Manfrotto MMC3-01). My backpack is a bit more full than last time, but it's still not all that heavy. And I take the opportunity to set it to my side whenever I'm sitting to rest or for lunch so that my back gets a chance to rest. I'll be carrying to same mix of stuff again in December when I go back to WDW.
You probably already know most of this, but just in case anyone can benefit from it, let me share lessons learned from my last WDW outing:
- I forgot my lens hood. Lots of pics have odd glare on one side of them. Don't forget your lens hood.
- I forgot to put on my circular polarizer. This was really stupid. Most of the pics were kinda washed out. Be sure to have a circular polarizer on for outside daytime shots. Be sure to take it off for indoor or nighttime shots.
- I *did* shoot in RAW. This gave me wiggle room for post-editing to make up for the aforementioned mistakes.
- I had nothing to stabilize my camera in darkness, so I got very few decent darkride photos. The monopod is going to help me with this next time (I'll just extend it enough to reach the bottom of the ride vehicle and it will give the camera more stability.)
- I didn't carry the fast prime lens last time. This also had negative impact on my darkride photos. Will choose lens wisely this next time.
- For dark rides especially, shoot in burst mode. Shooting one frame at a time in such poor lighting conditions, it's a crap shoot on whether it will be good or not. Shooting 4-5 in one press of the button, you're bound to get at least one that looks decent.
- *PLEASE* turn off your flash. It has negligible (or often, negative) effect for most things you'd photograph at Disney, and it just annoys the crap out of anyone around you.
- Take *LOTS* of photos and take *LOTS* of memory cards (I'm carrying 6 with me at all times). Be ready to offload pics from those cards to your computer at night to free up space for the next day.
Most of all, have fun!