I don't know about holiday inn but I stayed at the Aruba Beach club a few years ago which is inexpensive because it's timeshare.
If you want to avoid the fees for snorkeling you can drive yourself to the Asachi Beach. Just be careful of stepping on sea urchins , you just sort of drift out - take bread with you the fish are drawn to it. People we know who go all the time told us about the beach, I was skeptical but they said that this is where all the daytrip's take their guests . We got there we saw they were tourist boats that left their guests off right where we were.