As an 186 BB owner, I have come across the same issue. For the marsh anchor, I have it mounted across the back of the boat just in front of the rear casting deck. It rests about 1/2" in front of the rear casting deck and it sets just below the upper surface of the casting deck. There is a small flat triangular shaped area on the port and starboard sides in front of the rear storage areas. I mounted a stainless steel bracket on each of these. My marsh anchor (the heavy type - 1" diameter) fits neatly into these brackets. When I am under power, the anchor stays secure, and it is easily accessible, yet completely out of the way when not in use.
As far as a paddle, I have two collapsible paddles I keep in my forward storage. My landing net is collapsible as well, and I keep it under my rear casting deck. I have located a collapsible push pole from Cabella's but I think it is too long. I plan to modify my existing two piece push pole by turning it into a 4 piece pole that I can store.
Hope this helps!