Normal stuff I buy at WalMart if they have it. More difficult to find stuff comes from either Amazon Prime (2 day for free) or if I have enough of a purchase, I go to Dyersonline.com. I have to be careful though with Dyers. They will not take anything back past 10 days - so test things as soon as you get them. Luckily for me, the Valterra adjustable water pressure regulator that I got from Dyers was replaced by Valterra with no issues. I guess that is how Dyers keeps their prices down, but any place that won't take things back after 10 days is kind of sketchy to me. On the positive side, Valterra customer service was outstanding!
As for Camping World, I read the flyers, but I can always do better on price/shipping elsewhere. Besides the nearest store is a day of driving away from home. CW should seriously consider a store near Yellowstone National Park. We do stop at them when we are on the road and see one - it is fun to shop at a place that is all about what we love to do.
2012 GMC 3500 Duramax Crew Cab, SuperGlide 20k
2014 Cedar Creek 36B4, LP Onan, Level-Up, Trail-Air pin, electric fridge