Liz,
I have actually not had it done, however, many disney brides have and they have been very pleased with their photos. You can also opt to have an outside photographer take pics, but I dont think they are allowed access into the parks any longer. I know a lot of girls have chosen Randy Chapman (he is our wedding photographer) to take engagement pics on the beach of Poly or Grand because it is a lot cheaper than disney, and the pics come out gorgeous. Just a suggestion!