I think most of BC is bear country! Yes, bears and cougars are occasionally spotted in the area. The biggest thing is to not leave food or garbage outside for long periods of time - don't give them an excuse to visit! If you have a small dog with you, keep it on a leash. If you go walking in the woods, make enough noise so as not to frighten any unsuspecting wildlife. Don't let the animals scare you from going out and about - just be "bear aware". …gov.bc.ca/bcparks/…bearsaf.html
Liquor stores near Salmon Arm: http://maps.google.ca/maps?oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&um=1&ie=UTF-8&q=liquor+store,+salmon+arm&fb=1&gl=ca&hq=liquor+store,&hnear=0x537ef54d4f2026a5:0x400a2d627d7e3cc9,Salmon+Arm,+BC&view=text&sa=X&ei=m_igUbKyNOqpiQKy74D4Bg&ved=0CC4QtQM Commerical liquor stores usually stick to beer, wine & wine coolers. Government liquor stores have the most selection.
What kind of produce is available depends on the time of year and what the weather's been like. First week of July you'll likely see strawberries, raspberries, and possibly blackberries & blueberries if the weather has been warm. July is the very start of cherry season, which I hope you'll find, because Okanagan cherries are one of my favourite things in the world! You'll probably be too early for apricots, peaches & nectarines, though, which is a pity (but you never know . . . .). As for vegetables, you should find more than enough ingredients for a salad, plus peas & beans. It'll probably be too early for corn.
I think the Salmon Arm Farmer's Market is on Wednesdays at the Lutheran Church. Nearby markets are in Sorrento: shuswaptourism.ca/do/food-wine-and-farms/far… and Malakwa: shuswaptourism.ca/do/food-wine-and-farms/far… (I haven't been to either, so I can't say how large or good they are.)
Speaking of Malakwa, if you want a unique dining experience, you could try eating in an old sawmill burner: http://www.theburner.ca/ (TA reviews: tripadvisor.ca/Restaurant_Review-g2642374-d2… ) I've always wanted to try it, but never got around to it. Anyway, just an idea.
You will not be at a loss for fresh food in Salmon Arm/Shuswap. If the weather is good and you like your accommodation, I recommend just hanging out, enjoying the lake, and eating a lot!