Don’t call it a mission. This is the civilian world no matter what the FAA says.
4 operating crew. Maximum of 1 mechanic and 1 loadmaster. 6 total of 8 possible on a -400/-8 freighter.

Catering is passable, nothing stellar in 90% of the places we go. You could possibly make due diet wise here. My suggestion would be to find some bit of compromise otherwise you’ll be eating a lot of fruit.