Can I make a suggestion? You can always wash your outfit you wear on Friday that evening. It will be dry in time for Sunday morning bootcamp class. Also, I wear my actual PJs for the Yoga stretch class.
Another suggestion: just pack one pair of pants/capris that matches the tops you plan to wear on Friday, Saturday, and Sunday. I would also wear a pair of pants/capris on the plane that can be re-worn on either Friday night or Sunday. No one really pays attention to the bottom half; just to the top you're wearing.... This is a packer's secret weapon, BTW.
If I can pack for 2 week International trips with carry-on only (I've done this for both business and pleasure), then I'm sure all you fit road trippers can pack for this fitness bootcamp weekend.
So, who is up for the carry-on only challenge?
Kas and Deb will be my spies to report back to me. ;-)