Here is some more detailed information on lake Sam Rayburn that should help you plan your activities.
This link allows you to check the current and historical water levels on Lake Sam Rayburn.
This link will lead you to a map of the public access facilities on Lake Sam Rayburn and the types available at each location. However the closest public boat ramp (no amenities but is free) is in Hickory Hollow just down the road on CR 3185. The next closest is Jackson Hill Marina which has a small daily charge per boat.
This link will show you the calendar of upcoming events on Lake Sam Rayburn. A great place to find out the fishing tournament details.
TPWD Inland Fisheries offices have worked with local organizations to create underwater structure for fish in Lake Sam Rayburn. GPS coordinates for these fish attractors are available here.
This link will inform you of all of the fishing and hunting license requirements for the state of Texas. The fines are steep if you don't have a license so get it all taken care of in advance.
This link will inform you on all of the wildlife trails around Lake Sam Rayburn. A couple are less than half an hour from the lake house so lace up the hiking shoes and enjoy!
This link will direct you to all kayak launch points in the Austin Kayak database. You can easily zoom in to the Lake Sam Rayburn area. The picture on the left shows three kayak launch points right next to the lake house, even better is the fact you can launch directly from the lake house shoreline!
This link will hook you up with local fishing guides who obviously (check out the picture to the left!) know how to get you on the fish. Good luck!
This link describes all of the hunting regulations in the Angelina National Forest surrounding Lake Sam Rayburn.
Here you can the Texas Parks and Wildlife latest fishing report for Lake Sam Rayburn.