I've seen some RVs at a show without a clasp on the outside to hold the door open.
The door would stay in one place in any position you left it in. It's not hard to push open or closed but it doesn't free swing, the hinge has resistance like an old rusty hing would.
I think it's called a "friction hinge".
I'm not sure it would hold the door in position in wind like you're talking about but I think it would prevent it from slamming around.
Good luck. Let us know if you find what I'm talking about. I'd like to have one too.
2015 Jayflight SLX 287BHSW
2002 F-250 Extended Cab 4x4 6.8
Teconsha Prodigy P3 Brake Controller
Reese SC Weight Distrubition with sway control (12,000lb)