First things first- check out the different hotels websites. By reading previous guests comments about the service at the hotel and what they can expect from the hotel will give you a better idea of whether or not the hotel will suit you and your family.
Find out the location of the hotel — whether it is on the beach, in the mountains or in the city. The location can make all the difference and can cause you to not enjoy some aspects of your holiday, which can be avoided just by going onto something like Google Maps.