As far as I know, the tallest height requirements is 48" for Rockin Roller Coaster. Kids do vary in size, so not sure how tall your DD is or if she is the "adventurous" type to do thrill rides.
My daughter is 6 and has ridden all the thrill rides expect ToT. That said, if I did not have someone responsible to watch her, I would never, ever leave her alone - even if that meant missing out of rides. It's just not worth it.
I don't know if all the rides you are wanting to ride are in one park, but here's what I suggest. If you are staying on property, find out the late magic hours for that park (or parks if you can do multiple days). They are three hours after the park closes. Hire a sitter to come to the hotel room about an hor before the park closes. The kids are ususally beat and fall right asleep. Then you can go to the park and do all the rides you want. My husband does the late magic hours while I stay with the kids (and get some sleep!). He gets to ride the thrill rides several times each!
We plan on eventually doing a sitter so we can both go and do the late hours, but my littlest is still 1 and I am not ready for that yet!
Good luck and you'll have fun with your daughter either way!