you will be fine, as everyone says, they are just on the left as you go in, we have used them every year, going again in 4 weeks, Arillas rarely has any crime, but always best to be safe! the whole family will look after you, try there food, its very good, and not expensive, the pool is not normally very busy, we prefer to get wet on the inside! its a lovely peaceful place to stay.
Turn left as you go out by the pool, and its a nice little walk down to the sea front, about 15 mins, if you like cakes, there is a great little café just a little farther up the hill, watch the fella in the supermarket across the road, his adding up is sometimes suspect! though his home-made feta cheese is to die for, and his wine is very good. have a great time, we are sure you will.