Here are a few campsites I would suggest.
Beinglas farm at Inverarnan. Great site on the West Highland Way. It has a good bar on site plus the Drovers Inn about 200 yards away. The munro Beinn Chabhair usual starting point is from the campsite.
Glen Nevis campsite for Ben Nevis has a bar on site and the Ben Nevis Inn across the river at Achintee. Walking distance to Fort William centre also.
Already suggested the Red Squirrel campsite with the Clachaig Bar within a mile and on the doorstep of some of the finest hills.
The Kingshouse Hotel in Glencoe allows camping on its grounds also.
Sligachan on Skye, pub and campsite plus scary hills.
Bunroy campsite at Roy Bridge is a good campsite and has 2 pubs nearby
For a wild camp my favourite is probably Knoydart though we camped about 3 or 4 miles from the pub Im sure you could get closer without annoying anyone. And some of the best and remotest hills in Scotland.
I guess the list is endless and I look forward to seeing other folks suggestions
All the best