I will bump your thread (a) because I have something to add but also (b) because I like your username. I don't know if you intended it to be read the way I read it, but I responded with a giggle.
Are you endeavoring to prop the doors open a little or a lot? Or you want both options?
Here are some ideas that you may be able to adapt.
(1) WIDE OPEN PROP FOR ACCESS - consider getting high-strength hook magnets such as the Master Magnetics 7580 and simply tying the doors to a pair of hooks placed on the body of the van on either side of the doors. When I'm camping, my van turns into a veritable Christmas tree of objects held onto the side of it under the awning using magnets like that one. It's got a rubberized back so it will not scratch the paint if carefully applied to, and removed from, a clean surface.
(2) NARROW PROP FOR VENTILATION - For instance if it's raining, even with an awning offering partial door protection, you may wish to maintain a small opening only (rain often comes with wind). This is a home-made prop that we made for our Sprinter rear barn doors, but there are several on the micro-market that could potentially fit your side doors. Or you could DIY one that fits. This one is made out of solid oak, which I do not recommend because I think it is of insufficient strength, but the steel version I am aspiring to purchase is not available yet:
(3) SCREEN - You did not describe what kind of screen you wish to use, but here
are my DIY awning screen instructions in case they are of use to you. And a pic: