Try looking for these 2 books, I got copies recentlyoff of Ebay for less then 5 bucks, or your local library might have them. "Misty Mornings moonless Nights" by Norm Strung, has scale drawing for a small layout box type boat, which I built and it works out nicely. The other book is "Successful Waterfowling" by Zack Taylor, He has 2 entire chapters devoted to little "pond boxes" and towable blinds