RE: how tough are receivers?
There are about 4-5 Easy Gliders and custom built gliders like the "frog" at my field.. All run on 6100 and 6000 park receivers and they are always higher than any glow plane at our field. To the point where you can barely see them.
You're not gonna be zooming through the skies and doing insane maneuvers, it's a glider.