Not really. Patterson and Gimlin specifically went to Bluff Creek because of the many reports in that area, and tyey had that camera both hoping to get footage of the creature, and filming documentary footage. They weren't just wandering about in any forest and carrying a camera for no reason at all.
Actually, there is new footage all the time, especially game cam pics. The problem is that they are either lousy quality, known animals in strange poses, or outright hoaxes.
In the end, it really doesn't matter. More photographic evidence will accomplish nothing more than increased rancorous debate, something the world is already overfilled with regarding every topic under the sun.