Hi, I have already booked the Poly for April l5-21 next spring. This summer my dgd has discovered swimming and water and loves it. I have a feeling that alot of the vacation will be at the pool now. Question is, which pool would you consider to be better for a 4 y.o. child with autism. The Poly pool is beautiful but gets very busy. Is the GF pool nice also but less busy? What is the difference in the slides? Thanks for any opinions.