Having met up with you at Keld last time, when I was going the other way, then should I try and talk you out of it - NO! Go for it, look at the weather forecast for a period of good settled weather, take a bivi bag and walk from dawn till dusk!
I am too old, heavy etc for a fast walk so my excuse is that I walk slower so that I can enjoy the view but if that is what is your goal the go for it. I used to run marathons, not that I was ever going to win it but for the feeling of pushing myself to the limit and achieving what I set out to do. Having said that on a pound for pound basis I think that I would have beaten those who won the race only weighing in at about 7/8 stone - they wouldn't have been so quick if they had to carry an extra 8 stone on their back!
Live each day like it's your last. One day, you'll get it right!