I carry my gear on a daily basis in a Carradice Barley seatbag, which is large enough to hold a shirt, underwear, wallet, cell phone, tools, lunch, spare tube, etc. I roll up my clothes that go in the seatbag and that keeps them from wrinkling too much. I usually end up driving once a week on rainy days, so I bring in extra clothes at that time folded in a tote bag -- stuff like shirts, slacks, towels, socks. I always keep a pair of shoes in the office as well as jackets, hats, gloves. No need to carry stuff like that back and forth every day. On days that I drive, I also bring home laundry to wash.