Hi ive not been in August but i have been in July i have stayed in the tahiti and i dont think they will get too hot they are quite dark and you dont get a lot of light in the villas - the park will be very busy but theres 3 pools and lots too do i,m sure it will be fine - its probably better for the children as there are more organised activities and lots of children - you'll have a great time and the beach near the campsite never seems to be too crowded not like in Salou
Have fun