Can you use a motorboat on the lake?

I saw some small boats, pontoon boats, and some jet ski's throughout my visit.

No. Too small, many kayakers, paddle boarders, etc. It'd be too dangerous.

Yeah boat launch is somewhere else.. but it is definitely allowed

There is a boat launch on horse island.. motor boats are allowed on lakes.

There isn't a place to launch inside the state park, but there is a launch from the north side of the lake that motorboats can use.

I'm really not sure about that I seen kayaks but not one motor boat.