My real concern is once you get to Caesars Palace, give the K-Cup holder in the coffee machine a good rinse in the sink to insure any potential gunk is removed AND then give your coffee cups a good pre-wash prior to using them. Hotels, even the best are not so good in exchanging dirty cups with clean cups. The maids just rinse and wipe with the prior guests towels.
I think that traveling with K-cups in your hand carried baggage should not be an issue but if you do check luggage, put them in those bags.