i use a place in Point Roberts WA ,they charge based on size or weight ,usually a coupla bucks per package . may have to try the one Hyates uses tho . Hyates, do you have to register with them or anything . i had to for mine in Point Roberts.
just a wee tip if your picking up things from across the border.always have a receipt for those items and always have a few things sent .........

then you can declare one item and well you figure out the rest
