I'm shooting engagement photos for my sister this weekend, and I'm on a tight timeline since the both of us are meeting in our family's city, which we do not live in. I'm only there for two days for Christmas, and we plan on shooting Christmas eve. Since I only have a one day opportunity, we will still shoot if it rains, which I have never done but sure it will be fun. Just wanted to know if a rain cover of sort will be adequate in protecting my A7. My lenses are not weather sealed. Rain is not in the forecast, but cloudy is. This is a just-in-case.