Just purchased a 2012 white RTL and will be looking here for info on Tonneau covers and other accessories.
Stationed in San Diego for three years didn't see much snow there unless I went looking for it in the mountainsI can recommend Retrax..... don't really know about the other brands. Have had mine on since 2005 w/o issue. Disclaimer: I'm in SoCal. Have only seen snow a couple of times on vacation road trips.