Ah so much fun! Find a nice comfy spot, where no one will bother you, you have nothing to do for 3 or 4 hours, and bring about 1/4-1/2 of bud.

Yes it is great fun! I would invite a friend or two over just so you don't feal alone and get paranoid or anything. Bring music
I've done it, smoked about 7 - 9g's and by then couldn't smoke no more. Like, I couldn't even light the bowl, it was just that hard. It was great :P