Hey Cheli! That's fab that you might have accommodation in Edinburgh in August as the annual festival is on! If you left it any longer, you could be stuck, so jump at whatever you can! A friend of mine recommended this hostel to me to tell someone else about - it's near Edinburgh castle:
http://www.castlerockedinburgh.com/Here's a link to what's on at the festival:
http://www.eif.co.uk/ (It's on all month!)
Try and book your transport in advance and you'll get around a lot cheaper:
www.megabus.com
www.nationalexpress.com both give you deals, (for less than £10)
Have you seen my starter kit - I've also got a Scotland blog where I've been adding pics to different places
http://www.travelpod.com/travel-blog/kathryn77/4/tpod.html (there's a link to the starter kit on the front page)
You'll be able to get around quite easily as Scotland's not that big (it's about an hourish between Glasgow and Edinburgh by bus, and from either of those cities, to get to Aberdeen, it's about 3.5 hours. Let me know if you've any other questions, and I will have a think about what else is on, but thought I'd let you know about the Edinburgh Festival for sure!