I've got 3 votes for group C. As has been said, lets do this thing.
"Captain, I'd like to be Group C. I believe I can be of most help there."
The Captain raises an eyebrow. "Really? Ye'd take the duty furthest from the glory? The most dangerous part o' the whole damned attack?"
"It is also the most important part of the plan. If the savages don't follow us, the river party will get shot to bits as they land. It may not be the most glorious, but for the good of the attack as a whole. Plus," you smirk, "I'm good in the woods."
The Captain laughs, and claps you on the back. "That ye are, lad. That ye are."
3 days pass quickly, with preparations being made for the attack. Weapons are sharpened, leathers are mended, and boats are fire-proofed. You practice stealth and woodscraft with your men, and as it turns out, Kaer is a hell of a shot, and can pick a squirrel off a tree at 50 yards. In the dark.
The sun is setting when you order your men to gather their things. A few chaotic minutes later, your squad is assembled, all wearing dark clothing and bearing bows slung across their backs.
"We will approach the savage village from the Southeast, you say for the 10th time. "If we see any sentries, we take them out. When we get close, we run screaming at some outer buildings, kill a few savages, and run screaming back into the woods. We keep doing that until a good number of savages are following us, then we high-tail it back through the woods, and sound the first signal. Long-low, short-low, short-high. Understood?"
Nods all around.
"Right then. Blood flows."
"Heart Beats" they chant back at you.
"And still we live." You heft your axe. "Let's move out."
The goal is to get near to the village without being spotted. Roll 1d10.