Oh my. Planning a trip for that many teens makes my head hurt. I'm stressed enough trying to figure out how to make a toddler, tween, and newly-minted adult happy.
I love Lush! A store just opened in the mall in Lancaster, which was pretty shocking, to be honest. We usually bring our our empty lush tubs in a carry-on and pick up a free face mask or two at the lush in MCO. My oldest daughter loves Basin at DTD because the bath bombs are marginally cheaper there. She's already planned how to spend her birthday money there. I'm honestly hoping to avoid a trip to DTD and have pointed out there is a basin at the GF.
As for shopping, I think I fuss more over clothes than anything else. Having been there in August, I know I need to either pack two outfits for each day or plan to do laundry mid-week. We've made a fair number of tie-dyed Mickey t-shirts. The kids enjoy those, but I don't make them wear the shirts the same day. The older kids, especially, would just declare what a goober I am. We've been often enough that I tend to put aside what we already have (the cards they've collected playing Sorcerers of the Magic Kingdom, autograph books). Have your kids done any pin trading? Or collected any of the vinylmation? Mine always liked the idea of pin trading, but then didn't want to carry around those heavy lanyards. The vinylmation, though... I look at the
Disney Store site from time to time and have picked up some of the sale items (the wrestler line was particularly silly). There aren't many stores that trade (one is Villains in Vogue at HS). But it is fun. And my kids were usually happy with what they got (you pick a "door" and get the vinylmation behind it - you can keep the one you brought if you don't like the surprise selection).