Well, some considerations:
1- the most I read, the most I am convinced that if your father is unable to understand that most of things are impossible with bands, really you are trapped in a clearly abusive family. You should ask for help.
2- As thigh bands user, I am still thinking how the hell you will achieve to mount in some rides.
3- Thigh bands in a ride, a car, a boat, are not only useless, but also a high risk for the girl. And it is important that girls and key holder read this point.