Lots of good marinades out there. I prefer the cajun marinades. Also gralic and butter is good.

To prevent the boil overs make sure you dry out the birds cavity thoroughly. I inject my turkeys and then put them in the frig for a few hours. This allows the marinade to distribute and the frig also helps to dry out the cavity even more. I never had a boil over since doing this. Also put the turkey into the fryer slowly.

Good Eating!