Without knowing anything about your smoker setup, I'd have to agree with the others that it sounds like you may be trying to do too much on your first try. I've always found that with a new pit, I like to do something small and simple (and cheap) for the first smoke or two...just to get a feel for the pit. Temperature control, air flow, fuel usage/economy, hot spots, smoke production...there are lots of variables that are different on just about every kind of smoker, and they can ALL affect your cook. My advice would be to focus on trying to do one kind of meat for your maiden smoke. And since you've never cooked on this pit before (or any pit, for that matter), it would be wise to have a 'Plan B'...a backup menu...just in case the worst happens and the meat from your first cook is inedible. (not trying be overly negative, but it happens sometimes).
I also agree that it might be a good thing to involve you FIL in this cook...taking advantage of his experience on this will definitely help improve the chances of a successful first run.
Good luck! Hope it turns out great...be sure to let us know.
Red