Enjoying Pools in other Properties

I know Harrah has owned a lot of properties in Las Vegas. Is it possible if you are a guest of one of Harrah's property you can also use the pools owned by others that are owned has the same ownership?
AMENDED:

Harrah's now allows guests to visit sister property hotels. Just bring the keycard from your hotel.

Brent
Is this true? We will be staying at Paris next week and would like to use Ceasars pools. Is that ok?
That's quite exciting .....I'll be calling to check that one out!

Let us all know what you find out, please. We are staying at the Flamingo, but some of our group is staying at the other Harrah's properties.
D & K
Absolutely true! I just got back from staying at the Paris. We enjoyed the Ceasars Garden of the Gods pools with no problem!
Hi All,

I would like some clarification on this. I am not sure if it was because you all went last summer, but when I just called (less than 10 minutes ago), I was told by multiple resorts that this was not a possible option. I called the main reservation desk, as well as individual casinos, and all said that during in-season dates (March-mid October), you could only access the pool of the hotel you are staying at. The only time it was possible to visit other Harrah's pools was during off-season trips.

Can someone please clarify?!?

Thanks,
Brian
UPDATE:
After talking to more and different front desk reps, and their managers, apparently the policy last summer is what others have listed above. However, they are all unsure as to what the policy will be for this coming summer. They will not have this information until late March, and said to call back then.

Now I am just wondering if the wait is worth it, considering possible fare increases for flight between now and the end of March, for a late May flight (May 21st-23rd).

Guess it is a waiting game. Good luck to anyone booking. If any updates, please post ASAP.

Thanks all.
Brian
Called the flamingo front desk and they said yes...you could visit all the other pools. We're not going till October but would like to try out Caeser"s one afternoon.
VERY good news. Thanks for checking. You solved my "problem", which was figuring out whether to stay at Ceasars for 2 nights and move often or stay at Paris for 4-5 nights and move less, but a big reason why I wanted to stay at Ceasars was because of the pool -- the rooms as well -- but the pool was a big reason. Thanks.