So my group finished HoH and in the travel portion of ToB I replaced the encounter with the Phase Spider with the Ghouls of Clover's Crossing. The PC's meet up with the Crooked Kin near the Maidensnarl on the road to Tamrivena. The lead up to the encounter goes as written up until the point where they begin tracking Aleece. Here I replace her footprints with a pair of ghouls who've dragged her off.
Just outside the ruined village I explain the evening mists part to reveal a pair of shuffling ghouls dragging a limp form. At this point I laid out a Chase Encounter (modified longshot).
** spoiler omitted **...
Awesome ideas! I'm thinking of going this route. You didn't by chance come up with any maps for Clover's Crossing?