I'm only worried about not getting the second Wiimote/nunchuk and Zelda I preordered if they're short on those
I wouldn't worry too much about those items if you preordered them. They should (read: damned well better) have enough of a given item/game to fulfill all preorders...and probably then some (note that they stopped taking all Wii accessory preorders at the same time they reached their store allotment Wii limit).
I neglected to preorder a second Wiimote/nunchuk combo, but I'm getting there probably about a half an hour before store open to give myself a chance to get those items if they're available (the clerks were very noncommittal about what they'd have extras of and, if so, how many). My guess is that they get a handful of extra controllers of all shapes and sizes, as well as some more Wii Points cards.
P.S. Again, my GS is opening an hour early. I can't be too far from you, so I'm wondering if yours will be opening at 9, too.