Tents and wind and snug bags
Gear isn't always enough weight depending on the wind conditions. If Trek had been with us in the Canyonlands last week, she'd still be down in the Maze hunting for all her belongings.
Sand/rock anchors are cheap and work extremely well, assuming you have rocks or something to use for additional weight.
http://www.mountaingear.com/pages/pr...8%204294967278
I am a big advocate of semi-rectangular bags for comfort. Mummies can be very constricting and are really only useful when you need to minimize weight and dead air space. For our supported tours, we use Big Agnes Yampa bags. 40 degrees, down and the 2" thick BA self-inflating pad slips into the bottom so the bag doesn't rotate with you as you change positions. If you have the space for your big ole bag and it works for the temps you'll be in, it would probably be fine, just beware it may take up more space than you allowed. We also use cotton/silk liner sheets so the nasty polyester isn't against our skin and they add a couple degrees of warmth.
A couple extra carrabiners can come in handy, are versatile and are more secure than clothes pins. I use a pair to keep sandals clipped to my day bag so they're handy without having to dig into my luggage. However, I go on small tours of 7-10 people so dangling stuff from luggage isn't an issue.
A laundry line with pre-installed clips and hooks can be strung between poles. A folding wash bucket.
Headlamp like a Petzl Tika or a flashlight that converts to a lantern.
www.campmore.com and www.sierratradingpost.com will both have stuff at good prices.
Frends know gud humors when dey is hear it. ~ Da Crockydiles of ZZE.