Rich, congrats on the Performer! From my experience, you may want to mod the cover somehow to get it to stay on in those high winds you talk about. I come home often and find my cover on the ground, clinging desperately to 1 leg of the grill with the little velcro straps.
I keep meaning to get some velcro and stitch a couple more straps to one of the legs on the kettle side of the cart.