What are you bringing for food? I go to Canada atleast 3 times a month. Honestly, its not getting in you should be worried about... its getting back in. Even though you are a US citizen, this is where they have apt to search and make sure you are who you are.
Don't be worried about it, you can't bring some foods like certain vegitables, but soda/camping foods your all set. I know alot of people that do grocery shopping in Canada/vice versa. Have a good, safe trip.
Sorry, you can not add yourself to your own ignore list.