D&D campaign progress

Ive been working on my D&D adventure recently as Andrew will finish running Call of Cthulhu soon so I need to be ready to start probably in February, it looks like. I've finished plotting all the levels, rooms etc and have written basic flavour text for all of them. I've just started working on mechanics and details for traps and required skill checks etc. I've recently received my copy of the Pathfinder Bestiary too, so I can start filling the place with wildlife as well. That's always fun. Then I need to add the treasure and magic items etc. Some of the later stuff can wait until the adventure is underway of course. Hopefully the players will find it fun. Mostly that means a decent challenge and believable. Hopefully.