One of the perks I enjoy getting from Caesars Palace at holiday time is the plain-looking holiday card (nothing fancy) that includes two gift certificates -- each one for two free nights at Caesars anytime from Jan 2 through Sept 30. There are no black out dates.
These are intended for me to give as gifts to friends and family.
In years past I have used them for friends and relatives and even for clients.
The only restriction (and it's not much of a restriction) is that the recipient must have a Total Rewards card, and in the past my friends/family have simply signed up for a TR card on the Caesars website -- and then made their reservation using the gift certificate.
In years past my son, a Diamond player, has received similar gift certificates but there were black-out dates.
Since these are sent in rather plain greeting card envelopes be careful that they are not overlooked or tossed in the trash.