Elaborate dream where I cribbed the entire game from a series of not very good fantasy paperbacks where the heroes were very very good and the villains were completely two dimensional.

The only parts remembered now are that in the books, the heroes snuck into then destroyed a fortress using "war wagons" in a direct rip of Ep IV, including a scene where the noble ranger like halfling hero rushed to the side of his comic relief friend who'd actually destroyed the fortress - and who recovered and was perfectly okay of course. Then they parlayed with frog folk who wanted to join the good side rather than be recruited as shock troops - the frog people didn't want to fight but would guide the heroes to the villains' ultimate lair, *another* fortress hidden in a swamp.

All of this framed by wandering around a huge house I was visiting - they had plenty of places where a guest could stay, none with any privacy or quiet. And outside, where I kept trying to find a place to sit and write down these oh so original campaign ideas, and everywhere was spattered by recent bird poops.