Ya, just have your parents type up a nice formal letter saying they are aware of your travels and that it's cool with them... have them mention who you'll be traveling with, where you're coming from, where you're going, and how long you'll be there. Get a notary to sign it while both you and your parents are present and the border crossing should give you no problems.
Just don't try to bring any of that BC Bud home with ya
