Location Filming Questions and Answers for you native South Texans

So, these I know:

--The pre-release facility was actually in Sugar Land, Texas! The Sugar Land in this movie is in actuality Del Rio, except the downtown and home scenes were filmed in Floresville. And strangely enough, the town is mostly white, not Mexican!

--The Arco Station was off I-10 some 20-30 miles east of San Antonio near Highway 87, around the Adkins and LaVernia area.

--The overnight stay was at an actual used car lot on Military Drive and that was the Loop 13 Drive In next to it. That part of town has been a ghetto the past 20-30 years, but was once a respectable working-class area.

--The stadium is off Military Drive and I-35 and part of Harlandale ISD

--The chicken stand was in Pleasanton. So was the part with all the police cars piled up


So, my location questions are:

--The place Officer Slide stops the old couple?
--the town and bridge location where Lou Jean and Clovis hijack the old couples car and kidnap the officer? There's a brief shot of an old Shamrock gas station
--The Humble and Gulf gas stations location?
--the area Lou Jean goes to potty?

I know it'll probably be at least a year or two before I ever get a response on this. A shame! Old movies from the 70's are SO much better than 99% of todays crap!