The fried chicken is still delicious! We get it at the to-go location next to Mrs. Knott's and love it! Ask for it hot from the kitchen.
It will be crowded on Memorial Day. Unlike DLR the Knott's is slow loading so just be prepared for that.
I love Knott's for what it is. If you love thrill rides Xcelerator is awesome!
My DD11's 6th grade class is going there for a field trip on May 25th and she can't wait to finally be tall enough to Xcelerator.
Experience Knott's with an open mind. It's America's first theme park. Don't just do the thrill rides. Check out the original things. The graveyard-find the thumping heart grave. The old school house. The Calico Mine Train. The Log Ride. The Stagecoach. The Bottle House. Ghost Town. If it's hot ride Bigfoot Rapids. The Wild West Show. If you had younger kids I would rec. Camp Snoopy.
I have to agree about Ghost Rider (the wooden coaster). It is very rough and painful to ride. After my last ride my back was really itchy from all the blood flowing to it.

DD11 didn't like it either.
Drinks at Knott's are very expensive, more than Disney. And they serve Pepsi, not Coke.

They do bag checks at Knott's-for food and weapons. You won't be able to bring in your own sodas. Bottled water yes, no sodas. You could bring a small (collapsable) ice chest and put it in an outside locker if you want. I usually just drink water while there.
If you don't want to have the fried chicken one of Orange County's best restaurant chains (small chains) is The Claim Jumper. Great foodk, huge (shareable) servings. There is one just across the street from Knott's on the corner of Beach and La Palma. An easy walk from Knott's. Just go North from Knott's, it's right across the street.