I can't remember who the company was that did our excursion. Disney does not do their own excursions, they only act as a booking agent for the company who actually does the excursion.
I did a lot of research on the excursions offered and in the long run, I decided that it would be less of a hassle if we just went ahead and did everything through Disney. We knew all of our transportation to and from the excursions would be arranged and taken care of, and that the excursion company probably had to meet certain Disney expectations in order to be an offering through them. To us, if it was a little more expensive, it was worth it, as we were on vacation and did not want to have to worry about the little things.
Bobbi