Changes

*A tarp. There are a few varieties, my preference is actually a coated nylon rain poncho that doubles as a tarp. Good to separate you from the ground, or to rig up a shelter with, or to cover your pack when stashing it somewhere if it might rain. The new "siltarps" made with siliconized Cordura are extremely waterproof, ridiculously lightweight, and very surprisingly durable.

*Rain gear. As mentioned above, a poncho works well and doubles as a tarp, but even just a contractor trash bag tucked away is a good idea. If considering a rain jacket, remember that you'll want to keep your pack dry as well as not end up with your pants/skirt soaked.

*Sun screen. Standing in the sun without protection for hours waiting for rides can result in a nasty burn.

===Camping===