wow! after seeing that my next creek boat will definetly have a bulkhead , my original (1995) 16 year old micro 230 that I paddle now doesnt have one (although that old style plastic is bombproof). a heat gun should take that out no problem , I've seen it done before , not bad as your boat though. at least you got your float bags and stuff.
was the water receiding? was the main long run still with giant holes and pourovers ? when it's like that I usually put in just around the bend at the top just below the giant pourover hole by shore , theres a little inlet that you can put in easily , the main long run is the one with the man made bridges to walk up .