Ask that photog if he can recommend a make-up artist at least. Hair you can probably do yourself (as it was beautiful in your comp!) And also ask if you need to have more tan or not. And finally find out what YOU need to bring and what they will be providing. I.e. clothes, etc.
Since this is next Sat, I'd say continue to watch your diet so you don't bloat and run something similar to your last week's prep next week. You don't need to dry out as much, but follow that since you now know how it will change your body and what you will look like that day.