Only been once.
Must have been near 10 year ago when I did the west highland way.
I camped next to the burn.
Pub was busy but handy for a pint, not so handy for a toilet stop as the door lock was broken and the place was mobbed, fine for a slash but wouldn't fancy sitting down at the risk of someone walking in
Had a fryup the next morning and was treated as well as any of the much cleaner looking guests.
Dunno if they still allow camping? I read online (possibly here) that has maybe not been the case for a while.