Depending on your budget you may be shocked when you see the bids. I received a quote from two of the dock companies that were vendors at PB VII and they were well north of $3,500 for a 5x12 ft. dock with a walking bridge from shore to the dock. One was north of $4,500.
Given that the two bodies of water where I am now building wooden docks (each 4x22 ft.)are smaller (1.6 & 1.5 acres)we decided to only spend the big bucks at our 6.5 acre BOW that needs a new dock as well.
Bill is right, over the life of the dock the cost is probably the same or less (especially when you add in maintenance of the wood) but we couldn't justify it up front for 2 small, remote ponds that are purely used for fishing.
At some point we will spend $4k-$6k (or maybe more) for a poly dock at our big lake but it isn't going to be this year. BM61.
