I've travelled heavy (big bag, multiple lenses), and travelled very light (nothing but an advanced point & shoot). Two very different photographic experiences, and loved both.
So it's really what you're comfortable carrying, how much you are comfortable lugging around, understanding that it can make just walking around the park more cumbersome.
I do recommend bringing a decent amount of your gear -- anything you might realistically truly want to use -- with the understanding you can leave most of it in the room. Just pull out the tripod 1 night. Just pull out the super telephoto for the day at Animal Kingdom. Etc.