Meeting up with the group for the first time next week, for a chat. I suspect our group will be planning about 5hrs in the saddle and 2 hrs stopped per day for 3 days, at a pace of about 9mph. A little slower, but not too dissimilar a pace to your plan of 7hrs in the saddle for 2 days at 10mph. Personally, my 'bot' get uncomfortable at 5hrs in the saddle (I'm more used to 3hr/40km MTB routes). Our group will be on a mix of hybrid and MTB bikes.
The only other comments that I came across were references to weather. Got the impression that a significant number of people were disappointed by the weather in the Pennines - eg. fog, cloud and cold at the top. So it looks like a few bulky items going in my pannier for 'going over the top'.
Rob J