First, saw the link to your blog earlier....nicely done.
As for the swarm traps, Being a newbie myself, I'm in the exact same boat as you. Plenty of good threads and discussions if you want to do a search. In a nut shell, my understanding is 3 key factors, aside from location of coarse! Existing Bee smell in the box, lemongrass oil, and old comb.
I have out 6 swarm traps. In two of the six, I have two of the three. I used my 2 Nuc boxes that my new bees lived in for their first 3 weeks before being moved to their hive bodies, along with some lemon grass oil. In the other 4, they're new boxes so I only have the lemon grass oil. Not sure how bad that hurts my chances, but I figured it was worth a shot. :) After all, bees end up in some places with none of the three! :-D
I have read that the old comb can be a draw and problem with wax moths, but in practice, everyone I know that has it, uses it.
If you can find a source for old comb, I'd certainly make use of it.