My family and I went to Aruba in August of this year. The weather was perfect. It only rained twice for about 2-3 minutes, otherwise it was sunny and windy. The place is really windy. I would estimate 20+ mile an hour winds all of the time.
We stayed at the Marriott Ocean Club and we played at the casino there a couple of times. Very small and didn't open until late afternoon ( I think after 6 pm). I really can't offer any more help on the casinos.
All restaurants that we ate at had excellent food. The prices for groceries at the supermarket was kind of expensive and everything is much smaller in size.
If you like lush, tropical beach areas- Aruba is not the place to go. Most of the island is desert like, but the beaches are beautiful.
Enjoy your trip and bring lots of sunscreen. If you have any other questions, post them here and I will do my best to answer them for you.