You know, we could have saved you a lot of riding; there's a technique with a baseball bat that will render you barely able to walk in seconds

OP; 65 is still pushing it for every day. If that was one long stretch in a tour of 45-50 mile days, I'd say go for it, but unless you can prove to yourself that you can do 65 miles in one day and still be okay the next between now and your start date, I'd look into having the friend meet up closer to home.