While normal beds are designed chiefly for sleeping, daybeds are designed to be used for sitting or general lounging around. Daybeds are usually placed in areas where you entertain, such as the living room, and use a metal or wooden frame with one side open. They look like a cross between a bed and a sofa, which is essentially what they are. You can use a daybed for chilling out during the day, then you can remove the pillows at the back to make it into a bed for anyone who wants to stay over.
Canvas is indisputably the best material for your trailer canopy and other protective camping coverings. Unlike cheaper substitutes, it's long-lasting, naturally waterproof and doesn't degrade--but it does need a little TLC if you want it to stay in tip-top condition.
This is true of all canvas, of course, but it's particularly true for a canvas trailer canopy. Unlike tents and awnings, most trailer canopies will be sat out in your drive exposed to the elements 24/7, all year round.