If anyone is interested in the 4 x ferry return trip (£20.00 total cost, probably all cash payments?) then some really need booking.
Butley ferry is run by volunteers and is on various small boats, some rowed ... Bawdsey is every 30 minutes or on demand to late afternoon. I'm likely to be heading for the last (16:30) Felixstowe-Harwich sailing, so should book online for priority, otherwise it's about an extra 40 miles by road! Pm/email for full details rather than clog this thread up. Monday morning I'll aim for the Point Clear-East Mersea ferry, which will be on a summer holiday schedule by then, but I'll phone to check anyway.
I will be experimenting this week with all my bivi kit in a large saddlebag + bar bag, and try to avoid panniers or random extra stuff strapped on here and there. Which bike? Probably fixed ...