Guys, she's in Iceland. A short skirt and no panties isn't going to work, hell it could be fatal at the wrong time of year.
From my experience with other subs who have done this a butt plug under any clothes is going to be fun, the rubbing as you walk around is so obvious you will be aware of it all the time. A good tactic is a shopping trip with some specific things to buy, preferably from 3 or 4 different places.
Have fun!!!