Found a couple of other links from a member of our local group who does a blog in one of the local papers:

PN GJJC1 in M22 is a hard object. It is 1 arc minute from the core and is lost often in the triad of stars found in the location. Here is a link that will describe the challenges some have had in tracking this object down. Here are finder charts for GJJC1 Finder Chart

A better though very challenging object is Pease 1 in M15 which is probably best viewed come fall. In the constellation of Pegasus (west of 9Pegasi if I remember right). Pease 1 is 13th magnitude and should be able to be seen. Here is the finder charts and information Pease 1 Finder Charts in M15

Here is a copy of Dave Jurasevich's observation of Pease1 Dave J's Observation and a picture from Hubble that really shows the PN: Hubble Image ; the PN is up and to the left, its pinkish.

I think before trying for Pease 1 I am going to continue practicing on some other PN's that are on the border of my seeing. I find that experience helps but like I said, at 13 magnitude I'm not concerned about not seeing it. Cheers!