Launching a boat with only side mirrors for field of view

I went with a cheap wifi backup camera that works fairly well with an old phone. Biggest thing for me was when I was driving down the road I couldn't see the boat in the mirrors and I also like to see in the boat to make sure I don't have anything blowing around. I've got a 3 bike rack that attaches to the boat so I certainly want to see those to make sure something doesn't come loose.... especially if it is the Eriksen:) I think all together for the camera and wifi transmitter it was around $80 or so.