What Moth said ;-)

I'd also add Berrybrae & Loudon Wood, and with shameless self-promotion point you here:

http://bigstone.awardspace.com/aberdeenshireindex.html

I've tried to add some tips on finding & parking etc. where appropriate.

Inverurie would be a very good spot to stay as it's very central & has good bus links, an actual real live railway station and plenty of places to eat.

A car would make life an awful lot easier, even if you only rent one for a day or too, but this page will help you if on foot:

http://www.abdn.ac.uk/~lib266/stones/main.htm

East AQ will be heaving with hippies & crystal botherers* on the Solstice, so you may find more solace on one of the more remote sites-archaeolink is also worth a look for a rest day, but pricey.

Aberdeenshire: More than you'll ever see in a dozen visits!

* ;-)

PS, RCAHMS have just released a new book, 'In the shadow of Bennachie', it's £30 but well worth it.