Regarding your specific question re the lounges, my first suggestion would be for you to call each of the properties and ask. However, Memorial Day is a long way off and a lot could change between now and then. If the lounge is important to you, call now and then call again shortly before your stay. Even doing that, you may find that things aren't as you were told. I've been told one morning at a hotel that their lounge would be open that evening and then found in the evening that this was not the case.

Bottom line: You may want to make your decision based on more than the lounge.