There's some good info out there, I'll look up my stuff when I can.
Have you done one before? I know you're looking for a cooker. You have a source for the whole hog?
Here's one start on info:
FAQ for Whole Hog All I know is what I learned from some really good Memphis in May Whole Hog cookers.
They inject everything, especially the shoulders.
Just a pork rub, if you want to get fancy, you can do parts of the pig with different rubs.
Depends on how you're serving this. Will it be a pig picking? or will you clean and serve? Makes a difference if you're doing the clean and serve you can season as you pull
Not sure, but look at the brines in Brining 101 and use one of them as an injection. Yup, you heard me right. I do variations of those recipes in contests and since I did my Butt scores have really improved. oops, is that a contest secret