When I'm out hiking and carrying my Spark, I just initiate Gesture Control and hand launch it from wherever I'm standing. That's the main reason I like the Spark - the capability of not really having to have a flat surface and having to launch it from the ground.
Basically, just point it towards you and double click the back button. The lights will flash and off it goes. Once it's hovering, you can just shut Gesture off in the Go app and you're good to go.