I think you have a good idea. Murphy's Law almost guarantees that one of the rooms will have an issue.
This may not match the textbook definitely of Murphy's Law, but my observation to DonnaL would be that no matter how many hoops you jump thru, chances are some occupant of those four rooms will dislike SOMETHING once they arrive. Could be the location. Could be the view. Could be the floor the room is on. Could be the decor. Could be any one of a hundred things.
Checking in all of the rooms probably won't occupy a great deal of extra time, so you're welcome to do that if you wish. Just make sure nobody is getting the DDP because they'll be charged extra for you if you are listed on each registration.
Personally I probably wouldn't sweat it. Check with everyone after they are in the rooms and make sure there aren't any issues. If there are, call and get them resolved promptly.
Just be careful you don't spend the entire trip trying to bend over backward for everyone else. I've done that myself. By the second or third day of the trip I realized that I was spending so much time worrying about our guests' experiences that I wasn't really enjoying myself.
Additionally, chance are you'll be a lot more critical of any bumps in the road than your guests will be. To that end, you'll end up even more stressed-out trying to make things right while your guests have simply moved on.
That's my $.02.