I live in N.Y.(upstate) and travel the western part of the state fairly regularly. While I'm not a huge fan of Wally World, I do use it as a convenient rest stop on my wanderings.To date I have purchased approx. 300 yds of $1ripstop @ WW. I have only been able to find Sylnylon only once. I use the dwr and uncoated for all sorts of projects (I am Scoutmaster for a local Boy Scout Troop). I have had a hard time deciding what to use the 10 yds. of syl for. I just can't bring myself to cut it.
SM Troop 325
A tarp is probably one of the best uses for sil. And you've got just the right amount to make a BlackCat Tarp.