Don't beat yourself up...you did well w/his visit last evening. There are going to be times when you do slip up...just continue moving forward.
As for the beer/cooler bottles...his imagination will run wild, but who cares!
Enjoy your holiday and try not to allow the mlc monster to ruin it for you!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.