What do you think the chance is that...97% of the town is noncombatants?
High. Too much is happening elsewhere for the garrison here to be credible.
...I wasn't serious...
I believe the palisade faces land, not the beach, which is exposed. You don't wall off the sea when you're a naval power that worships the gods of battle and sailing. For example, the Greeks attacking Troy launched hundreds of ships across the Agean Sea, and had a palisade around their camp and fleet. When Hector broke in, they fought amid the tents and ships both. As for fire, I doubt they've had time to create stone buildings, wide brick roads, or lead-plate roofing. Probably wood planks and thatch roofing. Tinder.
Reasonable and obvious, repsectively.
And remember, we have no other way to meaningfully contribute to this war. Retreat means nothing to the Duke and his coming battle, but causing a disturbance here might shave a couple thousand off the forces marching to face him in order to better guard this place in future. We act here, or we cower. Like Joral's husband.
What the heck, you only live once. Attack!
We can't go guerilla this deep in their territory, scuttling around underfoot of such massive forces.
The conclusion is good but the logic poor. We lack the cover, supplies, and time to make guerrilla warfare plausible here. Although the kind of attack we're doing is sort of a component of guerrillas...
That kiss idea is clever. As long as we explain it to Marna as soon as we can (wouldn't do to have gossip of infidelity reaching the wife), why not?