You may or may not have difficulties. Jackals and I went to Fort Drum last weekend to pick up some gear. We told the US guard what we were up to. He was generally cranky but had no problems with what we were doing. We claimed the stuff coming back, and all the Canadian side was interested in was us paying duty on the stuff we bought. It can be hit and miss though. Jackals had some cranky old customs dude and wound up paying more than twice the amount I did, and I bought more stuff. I got a young hottie and paid bugger all.
"Anyone with a name like Amanishourbariki should give a few letters to the poor Ng family." - Snarfangel, Fark.com