Hey it actually looks like it could be quite good fun and great value.
£10.30 aberdeen - edinburgh train
£11 ticket for the lan
£10.30 edinburgh - aberdeen train
Only trouble is the last train leaves edinburgh at 9:50 but tournie doesnt finish until 10pm. So you could either leave early to catch the train. Alternatively, adding £Booze up and £hotel suddenly its a little too expensive for me