Tom,

I don't know of a quiet poncho, but you might want to check out some of the newer hunting jackets/parkas around that are both insulated, and/or waterproof. As noted,
take a look at Cabala's web site or their catalog. Lots of good stuff there.

I use a typical nylon poncho myself, but only when it gets to raining pretty steady. I carry it in my daypack. When stand hunting I don't figure the rain hitting on it makes any more noise than it does coming down on all those leaves. When still hunting I just
make a point to move very, very slowly to limit any noise. Must be doing something right 'cause I've snuck up on, and/or stumbled across several deer that didn't know I was there until I got within about 20yds. of 'em. [:-] Of course, they've been mostly
does or young bucks.