If you can drive up to AC, the DIAD (Diamond in a Day) and PIAD (Platinum in a Day) programs are still valid. AFAIK, this applies to all Caesars (Harrah's) properties nationwide, but always confirm before.
Direct from Total Rewards Customer Service
I'd be glad to assist you with the Platinum and Diamond in a Day Promotions. To participate in the Platinum in a Day promotion, simply earn 2000 base credits during one gaming day. For the Diamond in a Day,simply earn 3000 base credits during one gaming day (6am-5:59am) at any of our Harrah's Entertainment owned casinos in Atlantic City. Please know that in order to participate all base credits must be earned at one casino (earning 1500 at Bally's and 1500 at Caesar's will not qualify you for the promotion). We certainly hope that this information proves helpful.
As always, verify with the casino where you are planning to do the promotion (or with Total Rewards in advance via email). Gaming day is key, and varies by property and market. Since this promotion has changed, over the years, it's always best to be safe.
Also, be aware that Total Rewards Platinum doesn't get you very much more than some 'priority lines' (cafe, check-in, buffet) in Vegas.