We have a 13 foot Spotty( yes Spotty not Scotty), not sure of the year. Anyway, trying to figure out how we can also tow our bikes. One is an evoke so weighs about 40 pounds. We wanted to figure out a way to attach something to the tongue of camper and sit our 2 bikes on top. What do you all think? Is that ok as far as weight and hauling?