RockNess is over-rated now anyway so save some money: Go to Loch Ore, pitch a tent (the more poorly the better, one peg's enough) along the edge, take multiple crates of beer, blast out some Biffy on a playlist (live versions of course) using a set of portable speakers and throw an inflatable nessie into the water. There's also bound to be the sound of sirens in the background from Lochgelly. It'll be just like the real thing but a tenth of the price.
Sorted.