This November will be our first time staying at Cromwell. I'm traveling with family and we have multiple rooms. One family member only has a debit card and the other one only has cash. Is a credit card required at check-in for incidentals or can it also be cash or debit card? Past years we've been able to decline if we didn't want any charging privileges to our room. Using my credit card for all 3 rooms isn't an option. Also, is there a Diamond check-in?