Was in Costco today and they had a variety of nice items for summer camping.
Got a self inflating bed roll pad, a couple 300 lumens LED lanterns, some sunbrella pillows, and of course mega-packs of batteries.
They did have a nice selection of folding chairs, coolers, grills, hammocks and sleeping bags if you need any of that kind of thing.
They also had a really nice kayak for $299 that I'm thinking of going back to get - much nicer that the one I have. They also had a 2 man poly canoe that looked very nice.
The rest was watersports and gardening stuff. Good place for a lifejacket or a bicycle helmet if you need those things.
Never had a bad item from Costco - they really stock some good items at reasonable price - there always seems to be something extra included.