J.D.
I would say to stick with something knee length and tailored. I'm not sure what you will be doing outside, but if you are going to be actively participating in group activities, I suggest
flat front capris:
http://bananarepublic.gap.com/browse/product.do?cid=42897...
or a skort:
http://athleta.gap.com/browse/product.do?cid=46843&vi...
http://athleta.gap.com/browse/product.do?cid=46843&vi...
I would stay away from dresses or skirts because you never know if there might be a breeze in Texas.
As for shirts, try to find shirts made out of breathable fabric like cotton with 3/4 length or short sleeves:
http://www.anntaylorloft.com/catalog/product.jsp?productI...
http://www.anntaylorloft.com/catalog/product.jsp?productI...
http://www.anntaylorloft.com/catalog/product.jsp?productI...
Wear mininal jewelry and sensible shoes!!!
http://piperlime.gap.com/browse/product.do?cid=37371&...
Ok... so I went shopping for you! Thanks for the morning break! :) Have fun!