I wouldn't trust Bonne Bell as far as I could throw them - they can do lip balm just fine, but when it comes to something like a fitness competition, you're better off with a high-quality product. Like takniteasy said, Clinque makes a good one, and Christian Dior's gets a big thumbs up from me. If you have trouble applying it evenly yourself, I believe that self-tanner applications are offered as a treatment in some spas/beauty salons.
Good luck, keep us posted.