I'm going whitewater rafting and I want to bring a camera. Most logical choice is my phone since I'm definitely not bringing my DSLR. What's the best option for a waterproof case that will let me use the camera with ease? I was thinking a Lifeproof but was open to suggestions. I looked for waterproof cameras but they're $160+, so the case needs to be cheaper than that or I'll just buy one of those. Thanks!