Well maintained natural areas in Houston with small crowds

Maybe I'm asking for the impossible here, but I'm looking for a good spot where I can have a picnic. Lay out a blanket on the ground, eat and chill, and not get mauled by fire ants or be surrounded by other people. The more nature the better. I feel like middle of a weekday the waterwall could be a candidate but the view isn't very natural. Discovery green is alright but usually pretty crowded ime. When I look online the locations I get recommended either a. Have too many people or b. Aren't treated aggressively enough for fire ants, I'm not sure if there's an in-between out there for me.