Dollarama has decent lock-n-lock containers of various sizes all for a dollar. Be sure to get the ones with a rubber seal. Camo duck tape seems to have gone up in price since we started a year ago, and can be found in the paint section of Canadian Tire. If you take old wire coat hangers you can often cut, form and tape them while applying the camo tape so that the cache can be hung or suspended above ground in winter in a variety of hiding spots. You can also disguise them inside a hide like a bark round, grass bundle, or something else that looks like it belongs in the area, but is not interesting enough for the casual passerby to investigate. Just some ideas. There are also a number of very clever hidden in plain sight types of caches shown in the groundspeak forums that can give you other ideas.
Hope this helps , have fun.