If you are just looking for something quick and dirty, try drying out the wood then saturate with a penetrating epoxy (search on line for "Progressive Epoxy") then make-up whatever is missing with plywood and Bondo Structural Filler. Paint the finished product so that it looks somewhat uniform.
It will not be pretty but will probably get another couple of seasons use out of the boat.
1970 Havsfidra 20 by Fisksatra
On the Delaware River at Fox Grove Marina Essington PA