I load up in the morning: chemical sunscreen on the face/neck/chest, mineral around the eyes, then a moderately tinted suncreen as my "foundation". SPF setting spray, and no powder - I'll be re-applying later and powder can make that difficult.
I also use all cream makeup products because you can continue to layer those on top of each other during the day, without it getting cakey like powders would.
I reapply the sunscreen foundation later in the day by bouncing it on gently with a beauty sponge (not rubbing it on) touching up cream bronzer/blush as needed with the same sponge, and topping with an SPF setting spray, then SPF powder if I need it. Since I won't be re-applying again without washing my face (like before going out for dinner etc...) I don't need to worry about powder causing cakiness.
The key is that multiple layers of the routine must contain sunscreen to maximise the protection, since most people would NEVER apply enough SPF foundation or setting spray to get the full effect.
I know there will be some replies that all this effort is ridiculous for a theme park, however I spend about 5 minutes on makeup in the morning, and about 3 on touch-ups. It's just about having the right products that can layer well.