Ok - to answer both questions
1) Trophy club - closed but you can walk in and launch a kayak there - as of this past weekend when i swung by to check. Short 30-40 foot walk past the gate to the water. Small 10-15 car designated gravel parking area outside the gate (so you don't have to worry about tickets).
2) For a boat on the Vine - Murrell park is NOT an option and probably won't be until the water has dropped another 10+ feet Twincoves park might open first depending on if they can clean up the access road once the water drops enough. I think the only ramp open right now is Silverlake marina - for $20/pop. I doubt they'll have any other ramps open for weeks as the water is still way to high.
I read on the bass fishing thread yesterday that they are closing Silverlake temporarily for maintenance, just FYI.