I have flight club Europe from Amsterdam to LHR. We have an overnight at a heathrow hotel. I was going to pick up suitcase in LHR take to hotel.

Then first class heathrow to US on early morning flight.

I have a note on MMB " If you do not check your bags through to your final destination, you may incur multiple and/or additional baggage charges."
It would be easier to check luggage all the way to US.

Do you normally leave your suitcases at airport overnight?