So i know its still early but im already looking foward to the park being open, I seen the parks open on my birthday friday may 4th. What kind of attendence should i expect. Also sine we do have season passes when would be the best days for some visits,

That would be my birthday! lol Usually that early in the season it shouldn't be crowded.

It's basically what you could imagine:

Weekends will be the most crowded, especially as true summer draws near in June and July. As far as week days, Friday is bound to be the busiest, especially come four or five when kids get out of school and parents get out of work. This may not really have an impact, but I always keep in the back of my mind that if a family plans a three day weekend, they'll be at the park Monday or Friday, so the more concentrated to the center of the week, the less chance of that happening.

The best days to go are weekdays in the summer, and as early or late in the regular season as you can go (in other words, early May, or late in August / early September) when students are still in school and the weather is cooler.

That said, everything also depends highly on weather. A misty, cloudy, stormy Saturday may be practically empty compared to a sunny, cloudless Thursday in the same week.

All in all, Kings Island is not usually a "busy" park. It has plenty of rides and attractions to distribute the crowds between. Low capacity rides like Firehawk and Invertigo tend to get long lines early in the day and stay that way all day long, but for the most part you're not talking about any other attractions crossing the 20 - 30 minute mark on wait times during a typical weekday.

Just watch for special events on the calendar (like the yearly Christian music event, the political events, special guests, etc) and use common sense (don't waste your time going on a Saturday in July) and you'll be fine.

use common sense (don't waste your time going on a Saturday in July) and you'll be fine.

Unless you work Monday - Friday, then going on a Saturday would not be a waste of time.

use common sense (don't waste your time going on a Saturday in July) and you'll be fine.

Unless you work Monday - Friday, then going on a Saturday would not be a waste of time.

I mean, obviously? But if you have the option to not go on Saturday, that seems pretty common sense... Especially with a season pass, you're probably better off to go a few nights a week than all day on a busy Saturday.