They are about 300m closer to the camera, but you can also see power lines behind it at the top here: (8:22AM pic)
That red sign is also behind the gas staton, it's about three feet high
Update since I converted my camera to Infrared.
The above IR shot (the B&W one) is not necessarily ideal conditions, which is why it looks generally worse than the color shot. But, even with the limited test, I don't think IR would be a great benefit for the relatively short distance of the Wallace experiment.
IR does cut through haze, but it does basically nothing with atmospheric turbulence (i.e. chaotic refraction from rising hot air).
It also tends to lose contrast entirely on printed things. The red and white sign above now seems totally white. Even just that you lose color is probably enough of a downside.
It would not hurt to have IR as well as visible observations, but I'd not make IR the primary observing mechanism.