I agree with the others on the time and distance problem. And keeping the kids cooped up for the 24 hour drive.
If you are open to postponing a few months, even though I know you want to get rolling, try Silverwood Theme Park near Sandpoint, ID.
https://www.silverwoodthemepark.com/Park opens in May so it may be cool and he water park doesn't open till June but IMO it would be worth the wait. We had or grandsons, 10 and 13 last year and had a blast! It isn't as glamours as Disneyland, but the rides are good. Very good food in the park at reasonable prices, an RV park on site, great staff. The water park was a blast and a must do, IMO. Hit the ice cream store in the park. They make a cone for the teenagers that is huge and cheap.
We had the boys in DL when they were 6 & 9 and they both said they enjoyed Sivlerwood as much.
We didn't go into the smaller kid area but it appeared to be good.
I am plotting a trip this year with the boys again, they will be 11 and 14 and thinking about tossing their sisters, 7 & 4, into the mix. Might try to toss in their mother too.