I kegged mine at 3 weeks. I only used one box of graham crackers, but holy trub batman! Over a gallon or so leftover. If I do this again, I would add enough water for 6 gallons in the fermenter. I'll probably be pulling off a pint on Sunday for the Browns game, I'll let you know how mine turned out. Also if I do it again, I'll probably just bottle it all and let it sit for a few months and visit it then.