
I was born with my tongue firmly planted in the cheek... my sense of humor being much akin to Vincent Price -- dark but fun.
You might want to look at the Borodin "Final Curtain" book, it's got some great ghost stories that would work with the air that I believe you're after; the telling of tall tales being far easier to do and do in a light manner than the heavy handed stuff. You should also check out the links to the Gene Poinc stories and routines available through the Learned Pig forum and possibly even Dragon Skull in the UK. Gene had some wonderfully silly bits such as "Lizzy's Bunnies" (a very macabre version of Hippity Hop Rabbits) and of course Cal the Cadaver Carpenter... then too, you have dear old Eugene Burger to pull from when it comes to the sillish type tales... Eugene has a wonderful Spirit Slate routine but I don't know that it's published, you might visit his web site and see if he could point you in the right direction.
Even with all the silliness you want at least one good fright piece as well as one routine that plucks really hard on the heart strings. As to the latter I'd encourage you to get, if you can find one, the Lee Earle Muse Box. I've never not had people crying their eyes red when I do this routine, but you want to do it more or less to how Lee wrote it. I believe he outlines it in the book "Manifestations"
Feel free to PM me is you have any questions.