Going to Britanny for first time and need to book ferry. Can't decide whether to go for Portsmouth to Cherbourg or Dover to Calais. Portsmouth to Cherbourg will save around 200 miles but is £280 dearer, but Dover to Calais will cost extra in Diesel, tolls and time. I will have a 7 year old and 31/2 year old plus trailer so will need to drive carefully with lots of stops. Will also have a 260-270 mile drive on this side too. Which would you do?