Icons for iphone app baseball project

I am building an app for rating baseball field facilities and need a coherent icon set for several of the screens. This first project would be to create the icons that users click on to indicate their rating of a specific baseball field. The rating categories are for Parking, Toilet Facilities, Food, Shade and Pet Friendly. Within the parking category I want icons to indicate (No Parking, Street Parking, Lot Parking). Within the toilet category I want icons to indicate (No Toilets, Porta Johns, Toilet Facility). For the food (No Food, Vending Machines, Concession Stand). For the Shade (No Shade, Partial Shade e.g. trees, Proper Shaded Facilities). For Pet Friendly (Pets Not allowed, Pets on Leashes, Pet Friendly). In total for this job there will be 15 icons that should represent these elements. The app has a clean modern design and the color scheme will be selectable by the user, therefore the icons must work with any color scheme and should be on transparent backgrounds. The icons must work in the apple universal icon scheme. If the scheme is successful, there will be other design elements for the app available as separate projects.