Packing seems to always be a hot topic on this forum, rightfully so. I'm coming up on the big 3-0. When I travel, I like to pack leggings. For my age group, they are in style at the moment. I've seen women well into their late 50's wear them while vacationing in Europe. They take up as much room as a pair of undergarments and are super comfortable. I tend to take about 4 pair with me and rotate them. By doing this, I just have to find room for the daily sweater so that I have a new outfit each day. Leggings can be dressed up or down, so no worry on having to pack an extra pair slacks if you plan on having a nice dinner. If traveling in the winter, I will grab a pair that have terry cloth on the inside or just wear a pair of panty hose underneath. The weather tends to be no different than my location, so I'm used to wearing them in the cold.
One thing I always take with me is a small bottle of Febreze. Each night, I'll spritz my clothing to keep them fresh for another use, plus I just like the smell of it.