Are you still looking?
If so - try:Odetah Campground
in Bozrah, CT (off Rt 2)
Witch Meadow and Salem Farms are both nice (been to both).
You could also look into River Bend campground in Oneco, CT but I am not sure about the swimming.
There is another up in Barkhamstead...White Pines Campground
. I don't quite remember the pool but this was a nice campground and was family oriented.
There are others, but those are the ones that come to mind first. Sunsetview up in Mass is very
nice too - we've been there a couple of times. However, once Labor Day rolls around, they close up the pool.
Strawberry Park is extremely, ungodly expensive and you really don't get your money's worth unless you go off-season (and again, pools might be closed) but they honestly have a lot going on there for families and it IS very nice. Make sure you do not stay in one of the sites up near the office that BAKE in the sun, nor on one of the sites in the rear near the road (those flood out in the rain).
Hope this helps!!!