Hi, we tend to go in the winter (jave had to reschedule this winter as was booked and im now preg and it fell on edd).
we have 3dc, 13,5 and 21 months and taken them the last 2 years.
They have large female changing room, so I guess they'll have male as well for your husband and sons.
I recommend the flying start package too, used it last time and beat all the queues and made it much more pleasant.
We did bowling last time and I did spa, time before we booking high ropes, archery etc and tbh it was a bit much and we just wanted to cycle and swim.
I recommend the take away / delivery. It's pricey but delicious.
Re pool temp Heidi, we dd was 4 months I had a wrap for her but last time was just swimming costume. They have little life jackets there free to use.