Buy the cheapest non sew interfacing you can find, usually the precut sizes in three or ten yard lengths in packages at sewing stores or maybe available at K-mart of walmart.
lay the interfacing over the pattern, taping together a couple lengths where needed to make up the width, trace and cut. lasts forever, don't forget to copy the info, pattern number, piece number, grain line and etc onto the pellon pieces.
for really large items, why not use clear vinyl to trace onto? anything cheap, and noraveling will do, even 2nd hand bed sheets from the good will if you use lots of Fraycheck. LOL
I could see bed sheets working for a while, but it COULD fray after a while. still, in a pinch, use what you have. bed sheets don't fray as quick as some things. Wonder what Hubby would say if I hid a couple patterns on our bed sheets?
Oh, before I forget, use a sharpie permanant marker for marking the pattern with, it will not wash out or rub off. and forgive my trip to left field there. LOL
Kitty