I have an open trailer that I can place two 5 foot bunks on. I'd like to put them in a location that provides the most amount of support and balance. Since a lot of people cartop and use a roof rack I thought that horizontal supports would be the standard. But I have room to have both bunks go lengthwise if that provides even better support. Which way is best? Where is the best place on the boat for support to be? Thanks!