Food storage rules for the Bridger-Teton NF are here:
http://www.fs.usda.gov/wps/portal/fsinternet/!ut/p/c4/04_SB8K8xLLM9MSSzPy8xBz9CP0os3gjAwh wtDDw9_AI8zPyhQoY6BdkOyoCAGixyPg!/? ss=110403&navtype=BROWSEBYSUBJECT&cid=fsbdev3_063588&navid=110000000000000&pnavid= null&position=Not%20Yet%20Determined.Html&ttype=detail&pname=Bridger- Teton%20National%20Forest-%20Recreation
When you copy this, delete the spaces, which I inserted to keep the url from messing up the format on the page. The horrendously long url courtesy of whoever programmed the new USFS websites....
After a lot of searching a couple of months ago, I found that the same food storage order applies to the Shoshone NF on the east side of the Winds.
Areas with bear problems (black bear) include Big Sandy Lake area, Cirque of the Towers, Golden Lakes. (Per the Earthwalk Press maps and Nancy Pallister's "Beyond Trails in the Wind River Mountains.") Unfortunately, some people still think you don't have to protect food from bears in the Winds. Last year a grizzly wandered into the campground at Green River Lakes and helped itself to the contents of a cooler left on a picnic table. The area was closed to camping within a 5 mile radius for several weeks, but fortunately the grizzly never returned.
A month ago a grizzly was photographed by a trail camera along the Middle Fork of the Popo Agie, not far above Lander (verified by Wyoming Fish and Game Dept.). That makes the map with the food storage order very out-of-date. We probably should assume that grizz are now in the entire range instead of just the northern end.
Above timberline you can hang off big boulders (lots of those around!) or off cliffs. Your problem is likely to be that your friends, with their canisters, will want to camp where such "amenities" aren't handy. Whether the convenience of not having to find a place to hang is worth the extra 2 1/2 lbs. for the canister is your decision.