The most accurate statement regarding how the Iroquois might have assisted the British troops in a surprise attack would be that the Iroquois likely had better knowledge of the area and could lead British troops through the woods. The Iroquois, as a Native American confederacy, were experts in the terrain and the surrounding environment, which would give them a significant advantage in planning and executing maneuvers in forested areas.
Additionally, the Iroquois likely had better knowledge of the habits and tactics of the French and their Algonquin allies, which would allow them to plan their approaches more effectively. However, the primary advantage was their intimate understanding of the local landscape, which was crucial in executing surprise attacks.
While they may have had experience and strategies suitable for woodland warfare, it is less likely that they had more modern equipment than the British or that they instructed British troops extensively in new fighting techniques. The Iroquois had a distinct set of combat skills adapted to their own warfare traditions, which could complement British forces, but their intimate knowledge of the terrain was their most valuable contribution.