Hi wee kaz - have a look at the events on the VisitScotland site
http://www.visitscotland.com -click an area - highland games calender, outdoor events, places to visit, - all listed for the regions.
Got a tent? How about a couple of days to Islay or Mull? and just chuck the tent anywhere that takes your fancy. (if you haven't one - there are asome really well priced ones at places like Asda, Argos and even Halfords that will do for summer use, or borrow one from a pal)
YHA is a good way to see places too - remember the midges if you go into the countrsyside by the way! Take the BugOff with you. . .
THis is a handy site as well for what to do - lists events all round the UK but just put in postcode or a region and theres tons of ideas.
http://www.wherecanwego.com/?gclid=CKmFhcS1oIY CFUFsEQodals8tw
Have a nice break. .