1000x this!! will save tons of frustration. The alternate routes are marked on all maps of the area yet I am amazed at how empty they always are!
The Landing is fun if you like to shop.
My kids LOVE Dixie Stampede (we have gone many times over the years thanks to a friend that worked there)
Be prepared to WALK in Silver Dollar City-it is built on a hill and there are few flat areas

Ride the coasters after dark too, if possible. They aren't lighted except at the start/end so totally different experience at night when you can't see where you are going.
the Wonders Of Wildlife Museum next to Bass Pro shops in Springfield may
finally be reopened. The flagship Bass Pro is pretty neat too.
Save your money -skip the water park and rent a pontoon boat on the lake for a few hours instead. It is a great lake for family boats.