you can call the border patrol and ask for rehabiltation paperwork it might take some time to get it all worked out but that is the only way that I know of to be sure that you get in.

we go 2-3 times a year to a fly in and have only been "checked" once. 4 hours later they were pulling stuff up that I don't even remember doing!!! 15-18 years ago. After it was all said and done I had to pay $200 to become a temp. citizen of Canada for the week. I did get a resident fishing license that year though!
If you do get stopped at Int. falls I would go over to baudette and try there. chances are you will get in at one of them. It also seems to help to go through at 2 or 3 in the morning as the office isn't full of people and the guards are usually tired!!
my 2 cents!
tony