I had the pleasure of visiting the LBJ State Park and the LBJ National Park (Just across the Perdernales River) near Johnson City, Texas recently. We enjoyed a leisurely drive through both parks. The LBJ National Park features the LBJ Ranch which was quite interesting and beautiful despite the severe drought that the area is experiencing. During the presidential years, LBJ spent about 1/4 of his time on the ranch hence the nickname "Texas White House".
Although it is designated a National Park, the LBJ Ranch is still a working ranch where cattle are being raised and the pasture lands maintained for the most part as LBJ desired.