Yes, it is a very good camera. However, DSLRs are a bit more cumbersome than point and shoot digicams. If you don't mind changing lenses, having more to carry etc, then it is a great choice.
For me, I prefer something a little smaller, with a longer reach, at least for situations like WDW. I recently picked up the Canon PowerShot S2 IS, and I like it very well. It has a bigger zoom that you will get on the Rebel (without having to buy a new lens), and has image stabilization to help avoid blurry shots.
Don't get me wrong, a DSLR will take better pictures than a PnS, but they are more work. Have to weigh the trade-offs.
Andy