Always have a back up plan just in case. I know, you say your dream has been to walk under trees covered in pink petals that gently float all around you as a light breeze blows. No, wait, that is my dream. Okay, bunny trail over. You have always wanted to be married outside. Under the big open sky. But, the clouds are telling you to take it inside. Your planner is the perfect person to assist you in finding an alternative. I'm not saying not to go for it, just have a warm dry space for your guests.
Just in case.