Question about sun protection?

As i sit here in snow weary New England I am planning my summer. I will have to jobs one at a stable and one a the yacht club. I will be a riding instructor/stable hand and a launch operator. But I will be out in the sun 13 hours a day-from 8 a.m to 9 p.m. I'm red haired and Irish....im going to burn to a crisp! I'll wear a baseball cap and a T-shirt and shorts and sneakers-ill melt in anything else. I'll wear sunscreen obviously but what else can i do to help protect my skin? Any particular brand or strenth of sunscreen? And how about ways to keep my skin soft and not too dry? Thanks so much!