Don t try to drive pegs out of stressed or heavily damaged joints. Pull the joint back together as best you can, and if the peg is still frozen, drill it out. It just isn t worth the effort with a framing hammer or mallet. If you have to drill, use a smaller bit diameter than the peg diameter. Often you can save the peg hole by pulling out the peg shards with a pair of long nosed pliers.
Film is cheap.
Good drawings and measurements are invaluable. He managed the raising of the famous Malabar barn in 1994.