I'm sure you'll do great! I tried to stick to open shade as much as possible, and I took them early evening. That light is so perfect that I really didn't have to worry about the light and could concentrate on composition, interacting with the Senior, etc. I did take my strobist set up, but I only used it a few times for fill light when we were in the sun. I wish I would have had the nerve to try out some neat lighting effects, but I'm still so new at off camera lighting that I really tried sticking to good ol' mother nature
Just remember to take a deep breathe and have fun!