There is a public free nice ramp about 3/4 mile past the trailer park that charges ramp fee (same side of the road). If you launch there, and go to the right as you are heading out from the ramp, You will see the canal leading to Mattie. Mattie is totally secluded with the exception of a tiny trailer park and one single home. The rest is wetlands. Last I knew the trailer park on Julianna is charging big bucks. I've fished Juliana twice now but have a lot to learn about that lake. I know it has big bass.
Have you tried fishing any of the Tenoroc Fish Management Lakes?