yoleee - Looks like you have a good plan!
The product selection really depends on what you have found that's best for your hair. Personally, I prefer Motions CPR because my hair responds favorably with it.
Have you used any of the products listed?
Here's what I would take to a salon:
2 tubs of Design Essentials Sensitive Scalp relaxer (they usually use 1 tub at the salon, my hair needs two)
Motions CPR (for mid relaxer step)
Motions Neutralizing Shampoo
Suave Clarifying Shampoo
Nexxus Therappe Shampoo
Nexxus Humectress Conditioner (for dc)
1 plastic cap (how often do you think they clean those things at the salon???)
I'd let my stylist use her own leave-ins and ask her to only use a wide toothed comb.
If she's receptive to your requests and your hair turns out well (which it will), be sure to give her a good tip!