As stated above, if there is a currently a problem with an animal around the campground, some form of notice will likely be given.
There may also be an issue with open flames being prohibited in high fire risk areas though this usually refers to ground fire such as fire pits and typically excludes propane grills and campfires.
As for food... If you are in a motorhome, having open food in an occupied campsite while cooking and eating is not a problem. If you are sleeping in a tent, cook at least 100 meters (approximately one football field) downwind from your sleeping area.
Do not leave food out overnight or when you are away from your campsite. During these times food should always be locked away. Also, do not leave food in a cooler or similar container visible in your car as some bears are familiar enough with these containers that they can also recognize these containers and if a bear wants into your car during the night, there is a good chance they'll get in or cause damage while attempting to do so.
Living in and travelling throughout western Canada all my life I am somewhat familiar with being outdoors in bear country and where other wild critters can be a problem. Other than being chased once by a moose we surprised while off-roading, it has never been a problem. Most wildlife will try their best to avoid humans. Food is something that can tempt them to come visit however.
You might also want to check out the
Parks Canada, You Are in Black Bear Country webpage for more information.
With a little knowledge and some common sense, the wild creatures won't be a problem.