Elly, thanks, I did think about the issue of "staying fresh" in the heat. The entire conference, including most meals, is in the same hotel where I am staying so I can wear a jacket throughout the day. Most of the tops are sleeveless or short-sleeved so they will be very lightweight. If I switch the top in #1 for a short-sleeved shirt, I should be all set for the warm weather. I might also bring an extra skirt as you suggest.
Rita, you make some really good points about dressing styles and science. This particular session will have people from the industry and the granting agencies and I know from past experience that there tends to be an unusually large porportion of men in suits unlike most conferences where participants men wear khaki pants or jeans and no ties or jackets. So for this particular occasion, tailored and slightly subdued might be the way to go.
bj, that's an interesting idea. I have a small silk scarf that has a design inspired by the images of the tissue that I study. Might be a fun conversation piece and/or signature accessory.
Helen, good point about the dressier shorts - even if I don't find any shorts in time for this trip, I should definitely look for a pair of walking shorts for this summer.