Truth is, I really CAN pack very light, having travelled coast-to-coast by motorcycle, taken long bicycle trips, and had a career in the Army. I plan ahead to know where I can wash the few clothes I'm taking, and select items I can hand-wash in the sink if I must and that'll dry quickly, mostly socks & underwear.
I never even take shampoo, assuming I'll find some hotel stuff. The most toiletries I take are toothpaste and a brush, deodorant, and an electric shaver. Sometimes I take a bar of Zest soap, that I know can double on my hair if there's no shampoo.
Yeah, I can travel light. Problem is, when I don't HAVE to pack light, I don't, reverting right back to my gay tendencies. It's like an addiction.