Because I am somewhat obsessive when curious, I dug through back issues and found the magazine issue I referenced. Chris Conrad is the name of the photographer, using 4x5 FP4+ or HP5+ in HC-110 and I quote:
"Pre-exposing the scene to build some shadow detail, he uses a combination of polariser and red filters - also adding split neutral density filters - to hold density down in the sky portion of the negative during his first exposure. After darkness falls, he opens the shutter again to catch the star and moon trails, often leaving it open for up to eight hours"
Something like this
Thanks for your efforts. Thats exactly what I was thinking about doing. So much for my original idea. I'm not sure I'm smart enough to start stacking filters, but perhaps I need to do some experimenting before the trip.
I googled Chris Conrad and came up with his website http://www.chrisconradphotography.com/ he has some great stuff on his site, but not a lot of insight on the process.