Nick- You can't really go wrong with some small nymphs (pheasant tail, gold ribbed hare's ear, prince), and there's always the wooly bugger. Bead heads are probably a good idea this time of the year when the water is probably still on the high side.
Don't get too caught up in patterns.....your first time, remember that presentation is important in both salt and fresh water. Also, just like salt water fish will tend to orient themselves to current, so will the trout. Concentrate on current seams, obstructions that create a break in the current such as rocks and logs, and any pockets.
Good luck. Maybe you'll get obsessed with the sweet water too.