Camping/Beach/Outdoor Gear: Pack your goggles, neck alligators, gloves, mittens, hats, scarves, tissues, chapstick, sunblock, undergarment warming pants and tops, hand warmers, ski socks. You'll need them and you'll still be cold!
Clothing/Shoes/Weather Gear: It was in the 90's F every day that I was in SLC in June, 2005. Still, with that heat, there was still a day of rainstorms. Don't only pack shorts and t-shirts if you travel to SLC in the summer; pack an umbrella, too.
Miscellaneous: If you'll be skiing, and are based in SLC, you can rent skis and get equipment at CANYON SPORTS LTD at 517 South 2nd West in Salt Lake City. (801)322-4220. Don't forget to check out my travelogue SKI UTAH!
Clothing/Shoes/Weather Gear: One thing I learned about Salt Lake is that you may think it will be cold and you get there and die of the heat. Even if it is the middle of winter take at least one day of cool clothing. Just in case!