I'm taking a lot of precautions sending my food to my food drops in Canada. I haven't heard first-hand accounts from anyone who's done it, and some folks don't feel it's worth the risk of having a Canadian customs official decide my home-made granola looks suspicious so he's returning the whole package to sender.
I've talked to 2 customs officers in Vancouver and a lady at Health Canada, and I think I'm going to be okay. But as they all warn me, There's no guarantee...
Today I shipped my first food to Nanaimo. I expect to get there around May 8-9. Before I start paddling on the 4th, I'll send the next parcel to Port Hardy. A few days later, my wife, Carlie, will send the next parcel to Bella Bella.
Hopefully the food will arrive safely, and I won't have to rely on white bread and spam, or whatever else I can find.