Click the link on the first post, Soldier Boy!
There's a campsite on the Pub grounds (with some new facilities
for this year!)
and a larger site one minute walk away, next door.

I'm a mere performer - not an organiser - but I'm sure a google of campsites for Hardraw or Hawes (a mile away) will find more things for you.

Unless some kind bod that knows more, posts on here.....
Cheers!