I'll let you guys figure out how you're getting dry ice. I think that for the most part, people can buy their own dice. www.dryicedirectory.com is your friend. If you're buying dice, bring a towel to wrap it in, and then place it in a cooler.

It's about $10 for 10 pounds, which should last for about 5 hours of benching, give or take based upon the CPU. So roughly $2/hour

If you want to try LN2, yeah you'll need to bring some $$. I just want to get paid back the ~$2 per liter that I'll probably be able to get it for from a company. LN2 takes around 2-3 liters per hour based upon the CPU. So LN2 is about 3x as expensive as dry ice, at $4-$6/hour, depending upon the CPU.

But IMO, paying $10 for 2 hours of extreme LN2 heaven is soooo worth it . You might never get this chance again.