Yes!!! I went on the California Screaming (or something like that) roller coaster, the log boom ride, Thunder mountain, the waterslides without issue! (other than I felt totally woozy after the upside down roller coaster) No worries. Your hair will be completely secure. Totally awesome! Totally freeing! Enjoy.
I have a freedom wig. It will stay put completely while riding a roller coaster. You can actually pull on the hair and it will not go anywhere, not that I would recommend you doing that. I love that it doesn't move at all. It can get a little hot and sweaty underneath but I have not had any problems with it moving once I have put it on.