re: #187 Blind Frog Belly White
It depends on how far you’re riding, but my experience with gel padded bike seats is they seem real comfortable right up until you realize your junk has gone numb.
YMMV, of course, but you’ll want to pay attention to it.
Pulled back in by the bike posts.
Stand up every 15 minutes. Just for a sec.
As for carrying things: rack on the bike. Two weeks worth of laundry: trailer.