Some tips:
1.
Brine (whether wet or dry). Regardless of some of the latest views that brining is a waste of time my taste buds tell me different. I did a test two weeks ago and 100% of the people in the class preferred the brine over the not brined.
2.
Know thy temp Make SURE to test whatever thermometers you use so that 1) you'll know the smoker is running at the internal temp you want and 2) when you pull it on whatever temp for the Turkey that it's really going to be that temp.
3.
Don't stress, write down a schedule One of THE big stress points if figuring out what to do when. Build a list of everything and create a timing chart/list. Just like a contest. It'll save a LOT of issues, just make sure you do the turkey and they do the rest
4.
NEVER NEVER NEVER They said it already, but do not wait until T-Day to do your first whatever version of turkey. I've done them enough I know my timing for my method be it whole or spatchcocked.