I was thinking about this, and here's what I came up with:
From what other people [NPHC members] have said, this could be a big problem for you. If it does turn out that it won't work for you, you COULD consider pledging a non-NPHC GLO. Is it really be-all end-all that you pledge NPHC?
I don't really know a whole lot about NPHC, and I'm not trying to drive the wrong way down the boulevard

so if I've said something stupid, please recognize that I'm trying to help by offering an alternative idea.