In reply to SophieToast: find a nice wall 4 foot off the ground and a foot wide. Walk along it in hiking boots, no pack , then with loaded back pack. Factor in a cross wind and 20 people coming in the other direction. It's not perfect but will give you a clue.
How well do you pack the sack, how stable is it, will it be wet by the time you get there. These are all questions we can't answer.
There is an easy track a few metres down one side so you should be fine if you don't fancy the ridge but there are more logical backpacking routes up.
I would prefer Sykeside up to Hart Crag, along to Fairfield, Dollywagon and Nethermost Pike.