Karinofnine – I wasn't going to mention the Big Bike Bash but as you bring it up:
This is a whole weekend of biking, live music and a real ale festival. Pretty much everything is included in the ticket price from XC racing to Lake Jump to Kayaking to Climbing Wall to giggling while pissed.
Pretty much everything you want in a weekend and all profits go to charity. Camping is included for free but you do pay extra for Chalets with running water*, cooker and showers.
Nick
*Depends who shares your chalet