I use the camco de-flappers-inexpensive. I also bought a pair of the smallest screw in earth anchors from Menards. I screw them into the ground roughly below the ends of the awning where the arms are attached then use a ratcheting tie down to secure the awning to the anchor. Works great and cost little. I have never used the awning in "carport" mode which is when you unhook the arm from the bottom of the camper and set it up like a post to the ground. If I did, I would use the earth anchor and ratchet strap to affix the leg to the ground, not pins or stakes.
2006 23B Hybrid with 10k round bar WDH
2011 F150 4x4 SCREW Ecoboost, Max Tow, Integrated TBC, 3.73 LS axle, Firestone Ride Rite airbags.