As Pard promised, this section of forest is somewhat denser than the rest, with many large trees about. Scoping the terrain, each character finds a spot, taking cover behind a tree. The forest undergrowth here is light, allowing relatively good mobility. The forest birds and animals continue their constant distraction of twittering and rustling. Settling into position, you wait.
The wait goes on seemingly forever, but finally, through the foliage, you see gnolls appear. They are about 60 feet away on the forest trail. They are difficult to spot at first - they wear cloaks that seem to blend with the surroundings. These gnolls are no ordinary gnolls. They are big and thick, very heavily muscled. The first two gnolls are in studded leather and bucklers, and carry longbows, with battleaxes on their back. The next three don't have any armor visible (though there may be chain shirts under their cloaks), with a longbow in hand and a greatsword strapped on their back. The last gnoll is like the first two. Though spread out on the trail, Manzanita thinks she can catch all of them in a web.
The two gnolls in front drop to the ground and seem to check for tracks. The others scan the forest around them.
Remembering Pard's advice, the group slips fully behind the trees and undergrowth, becoming impossible to spot. Relying only on your hearing, the light sound of rustling leaves and soft footfalls tells you the gnolls have started moving again, and are now in the ambush spot.
Trees provide cover. Undergrowth halves movement and provide concealment. Tumble and Move Silently checks increased by 2.