Great summer place for the kids, not so much for adults.
My son is 6 yr/old and he adores Calaway. I think we went once every two weeks this summer? We get our season tickets before the new year when they are half price(ish). It's terribly expensive to go only once, I feel bad for anyone who is traveling though! Season pass holders get coupons to give to friends/family which at typically $19.00 - they come in very handy. We have taken a few of my sons friends with us on occasion cause it's way more fun for them if they have a buddy. Cause common, who only wants to hang with mom & dad? haha
When kids are too small I'd reconsider getting passes unless they are accompanied by an older sibling. The rides are geared to a mid-height level, so there's a limited number for the wee ones. Try to go at off peak times, we've had trips where there were no line ups and visits where the line ups were insane.
Plan ahead! Bring your own food & water bottles. Water is $3/each and food is equally ridiculous. Also it should go without saying but wear sunscreen & have hats!