I checked the Camping World website for their selection of canopies and find the same. Lots of hype about UV protection, easy to set up, etc but none clearly state they are intended as a rain cover as well.
Are there camping collapsible canopies that can function as rain cover?
STAY AWAY from Camping World and RV stores!! Check out big box sporting goods for your RV needs. Better quality and way better prices. :W
And YES they make a plethora canopies that protect you from the rain. They even have one that is rectangular so it fits over your picnic table.
Any of the EZ-up 'type' canopy's should do the job. The wire cross hatch frame is what keeps it up and water running off.
Gandermountain, Ozark Trail, Dicks Sporting, quick shade, quest, ez-up, etc. There's a whole bunch of cheaper ones that work just as good. Big box sporting stores have them all on sale now.
I have a cheap knock off one the Ozark Trail I put up over the dog pens in the driveway while I am remodeling my Florida home and it has been up for over a year thru the huge downpours, and pretty high winds they have down here during the rainy season. It is still standing and dogs are dry!
http://www.gandermountain.com/Camping/Tents-Sheltershttp://www.dickssportinggoods.com/family/index.jsp?ab=TopNav_Outdoors_CampingHiking_CanopiesShelters&categoryId=4414990&cp=4413993.4414966