First row palapas can be rented for $35 per day or $25 per day for second row.
Cabanas at the beach may also be rented at a cost of $25 per day. The cabana rental includes an ice chest with bottled water.
If you choose not to pay for a palapa or cabana, chaises and shade at the pool are first come first served. OR you may reserve a palapa the day before beginning at 4 pm. The towel hut folks set out chairs about 3 pm for those who do not mind waiting. Some bring drinks and make a social occasion out of it and others bring a hat and a good book.
When we were at the resort in June with the Aruba tower being closed there were always more than enough palapas and there was no need to reserve one in advance unless you wanted front row.
In June there were evidently not enough calls for advance reservations for the $35 palapas so were able to reserve them free of charge as long as you got there at 4 pm. First row was always the first to be reserved.