Do you have the little awning support pole anchors on the outside of the body just at the
decal trim line? On my '02 190P, one is located just aft of the rear wheel well, and the other
is on the passenger side door, just forward of the 60/40 hinge. I don't often use it, but we always
place the support poles in them, and there is a locking mechanism, which when the pole is inserted,
the upper horizontal pin slides down over it to lock it in place. So far, these things have kept ourpoles
from turning into projectiles, or methods of self-flagellation in the wind. I'd guess a gusty or sudden wind
would cause problems for any awning.
Sorry the example pic isn't great, I was actually photographing my battery.
Fiamma or an RV place might be able to assist in finding you some, to retrofit, if you think they
might work better than planting the poles in the dirt or rocks.
I think you can just make out the slots for the upper horizontal pin that locks the pole in place.
Don't know if this helps your situation, but it may be food for thought.
I suppose if the wind were strong enough, this setup might get you an airborne ride towards Kansas.
Maybe I should lower the awning while driving. Might make the B handle better in the cross winds.
Good luck with it.