I bought a LEGO set from a yardsale and have no instructions, box or date
If the boat is dark blue then the set is almost certain to be set 60069-1 Swamp Police Station since according to Bricklink it is the only occurrence of the boat (part 62812 Boat, Rubber Raft, Large) in dark blue.

The presence of the bars (parts 92586 and 60621) with white frame[s] (part 60596) and light bluish gray radar disk thingy (part 4285b) confirm this theory.

However, I was unable to identify the large black piece near the top-left of your picture, or find something similar to it in the set's inventory.  Is this a single piece?  If so it is probably not part of the rest of the set.