I hear you! I am already putting aside little stacks of summer wear that won't make the trip back to the mountains this fall/winter. I'm going to wear the heck out of 'em then leave them behind.
I think this is a good opportunity to decide what you are iffy on. Pack up the beloved items you know you can't do without and then move on to the lesser and lesser desired stuff. I packed just the choice goodies to come out here and left the warmest and least worn clothes behind. When I went back for a visit and brought those secondary items back, I found they weren't up to snuff by comparison. I did a post here of those button down shirts and wrap dresses and I think only 1 survived. So, my original instincts of what to grab and what to leave behind were on the money