Tomorrow we're playing Felltower, and the players decided that waiting 12-15 months or so between attacks on the orcs wasn't really conducive to taking advantage of the effects of the prior raids.
That said, the players also realize that the orcs may be on high alert since the attack was so recent.
So it's going to be a battle between prepared delvers, ready to follow up on the damage they caused last raid, against prepared orcs, ready to deal with a raid that happen oh so recently from the same delvers.
Out of game, this means a battle between the wiles of the players and the power of their PCs, versus the numbers (but lesser power), wiles of the orcs through the GM's perception of the same, and the limited options of the orcs based on their racial preferences and tendencies. Man for man, the PCs outmatch the orcs. But the orcs have many more "men" than the PCs, and the PCs are casualty-averse despite (or perhaps because of) the sheer amount of casualties that Felltower demands. The PCs have more of a range of resources, but the orcs have more of the specific resources.
So this is going to be potentially an interesting session.
Plus I get to deploy ever more of my painted orcs! Hurrah!