There are probably thousands of potential locations in East Houston.
There is also the option at one or more of the houses knocked down daily for McMansion replacement in the Oak Forest neighborhood. S.E.A.L.S. on patrol would probably not be amused.
Your main challenge is finding a location where you would not be tresspassing.
Two weeks ago I was in West Texas for the Pecos Run and Gun (rained out). The remains of the town Toyah, TX would probably be ideal for a SHTF film - I said that aloud to to my friend as we drove through. That is a long drive from Houston - but the imagery was perfect. It is ironic that Toyah's final blow was a flash flood in 2004 - Pecos Run and Gun 2014 was cancelled due to a flash flood and turned into a vehicle recovery effort in the flooded desert.
Ghost Town Toyah, TX
If you are willing to drive 3.5 hours from Houston there is a Walking Dead themed Zombie Destruction Biathalon on October 11th. You can hold rifles and take all the photos you want - no legal hassle - and there are some structures there that look close to abandoned. There is thread about ZD in this forum. I'm confident you could enter the property, take your pics and hang out with no hassle. Only biathalon participants have to pay to enter.