screen -t "window 0" 0 bash -ic 'HISTFILE=~/.bash_history.${WINDOW} bash'
screen -t "window 1" 1 bash -ic 'HISTFILE=~/.bash_history.${WINDOW} bash'
screen -t "window 2" bash -ic 'HISTFILE=~/.bash_history.${WINDOW} bash'

bind c screen bash -ic 'HISTFILE=~/.bash_history.${WINDOW} bash'
bind ^C screen bash -ic 'HISTFILE=~/.bash_history.${WINDOW} bash'

export PROMPT_COMMAND="history -a; history -c; history -r; ${PROMPT_COMMAND}"

cat $HISTFILE
#or tac, less, $EDITOR, ... depending on how you want to "access" it

case "$TERM" in
   screen)
       declare SCREEN_NAME=$(echo $STY | sed -nr 's/[^.]*.(.*)/1/p')
       if [[ $SCREEN_NAME ]]; then
           HISTFILE="${HISTFILE}.${SCREEN_NAME}.${WINDOW}"
           declare -p HISTFILE
       fi
       unset SCREEN_NAME
       ;;
   *)
       ;;
esac

if [[ $TERM == screen ]]; then
   declare SCREEN_NAME=$(echo $STY | sed -nr 's/[^.]*.(.*)/1/p')
   if [[ $SCREEN_NAME ]]; then
       HISTFILE="${HISTFILE}.${SCREEN_NAME}.${WINDOW}"
       declare -p HISTFILE
   fi
   unset SCREEN_NAME
fi