Capernwray has added their known summer traffic to the next few months on the busy ferry schedule. The updated version is up at https://www.thetisisland.net/ferry/current-combined-busy.pdf, or can be found anytime linked from the ferry section at thetisisland.net. Fridays and Sundays are especially deserving of attention, if you're planning to travel those days.
If anyone else has information about busy traffic sailings that aren't already on the schedule, please let me know.
Veronica, veronicashelford@gmail.com