hmm you're in the states and I'm in Canada so we may not have the same stores. HOWEVER I do go to states pretty often and usually hit up Macy's and I always see something I like whether it's in my size or I actually buy it is another issue though, I recently found one of my favourite dresses at target on the clearance rack for 5$ forever 21 have some nice ones though for what you described it may take some looking but it's worth a shot. Do you guys have Garage? (no they do not sell tools) I've found some nice dresses there, including the one I wore to my cousin's wedding.
Equestrianism; 10% luck, 20% skill, 15% concentrated power of will, 5% pleasure, 50% pain and 100% reason to remember you're absolutely insane to be riding a beast that big.