I must admit I love the photos but I am getting a little sick and tired of dragging 3 or 4 pounds of camera and glass to the parks everyday.[...]
Just my thoughts ... anyone else thinking of going lighter ???
YES... omg yes.
I took my D7100, a borrowed D600, and my EOS M (interchangable lens compact), to WDW last month. I wanted to take the D600 just for a couple of family portraits (one from each park), use the crop body dslr as the basic goto camera and the compact comes along for basic easy going days.
The FF body (with a good lens and tripod and all that) really did add to the family portraits I think, but I wasn't about to lug it around all day. Hats off to folks who do, but it was hot, I was hot, and the camera is big. So into a locker it went until sunset.
The D7100 replaced my older D80 and is a really nice camera. After day one, I left it at the resort. What I found was my compact system canon took just as good a pic. Not as good a camera. It was slower, and continuous shooting mode was a joke, it took ages (like 2 sec or more) to clear the buffer for the next shot(when shooting RAW) and I still don't really like live-view. But... for me... most of my pics are character interactions and some poses around the park. Things where I have a bit of flexibility in timing and composing my shot. If I had better lens options for the canon, I would have left the 7100 home altogether.
If you need absolute spontaneity then absolutely find a light dslr. I'm not sold yet on these superPnS yet, but I imagine you would be well served by a aps-c sensor interchangable lens system.
I think the Sony NEX3 or 5 or whatever is probably a better option than the canon I have (my canon was pretty well priced though), maybe the new samsung nx2000 as well. I did get to play with a couple 4/3 systems and the Nikon 1 system and some were better than others. for instance, I didn't think the nikon 1 J1 performed better than the sony rx100 (same sensor size).
I'm rambling... I guess bottom line is ... don't convince yourself either way until you get a few different styles in your hand. I have been a "bigger is better" guy for a long time and was really impressed with the picture quality I have seen from the newer compacts.