I will start with the carpeting question. I would recommend that instead of carpet, you use vinal. It cleans alot easier the carpet. If you still want carpet, you can cut carpet to fit around the furniture, and use snaps to hold it in place.


Second, you can look at Overton's or Boat U.S. they both carry furniture for pontoon boats.


The layout question is one only you can answer, I would look at what you what to do with the boat. You can try looking at a couple of pontoon Manf. web sites and look at the layouts that they use, and take the best from each.


Good Luck