I used both whispering fountain and fiddlers lament for my CC campaign.
I started with murmuring fountain right at the start of the campaign, introducing the madman at the funeral, and using the ghost appearance at the fountain before the blood on the monument situation started.
Fiddlers lament I ran while the pc's were still doing research. I had kendra ask them to pay a bill for her at the local shop, and told them about the far-off fiddle playing as part of the description of the day's weather and activities going on. I did scrap the very similar event described in the AP though
The dead can only rise so many times befores it goes from creepy to boring.
Also I'm planning on using the dark stranger as a recurring nuisance when tehy start lagging in XP
I used these plug ins as a way to give my party of 5 (with 4 newbs) enough XP to be comfy at lvl2 before they went to the prison.