I've been on the tour several times. There are many refineries along there, and Homeland Security will not allow photos. It is stated in the rules prior to regristration. I noticed the last time I went, that the Port of Houston Authority is willing to give permission for photography for a select few. I'm not sure what the criteria is; however, I'm willing to give it a shot by being honest. Hopefully this ban will be lifted soon, because Google shows the same refineries as the tour. Until then, I'm not going to lose any property over it.
Brady's Landing is a not-so-tasty restaurant that offers excellent views of barges (if that's what you're looking for). San Jacinto is a very nice park, but once again, it seems dominated by barges.
The Texas City Dike is a fishing area that used to be free; however, after the last hurricane damaged it, there is now a charge. This area can get crowded. If you get a spot on the end it's a lovely view though.
I don't have any fancy equipment with me or anything, so I'll stick with my narrow little walk to the end of the Galveston ferry (Bolivar-side) jetty for now. It's free, you catch everyone coming in, and very few people (if any).
As I stated in my previous post, I'm very new at this, so I'm still exploring new spots.