Hey, JuliAnna. Believe me when I tell you there is no place like Walt Disney World when it comes to being accommodating of us Pooh sized people. Tell those people to hold their own bags - you've got to get your fun on!
Many of the attractions have restraints that you can adjust. You will find
the Haunted Mansion and
Big Thunder Mountain Railroad have a restraint that you pull back only to the point where it is comfortable to you, so you can control it. The same is true for
Toy Story Mania.
Other attractions, such as
Pirates of the Caribbean and
Na'vi River Journey have bench seating, so you won't have a restraint at all - just slide in. If a ride has a seat belt, such as
Soarin', a good strategy is to pull that seat belt all the way out before you sit down, then buckle once you are in place. My husband, who is both tall and big, sometimes asks me to help him find the other half of the buckle, so enlist the help of one of those family members.
Outside of
Avatar Flight of Passage, you'll find a sample car. Try it and see how you feel. Then you can decide if you want to ride.
Have the most magical visit, JuliAnna!