You know, I prefer the Saltine wrappers when making my wings for any type of emerger or dun. I'll even use the sandwich wrapper from my Trimana sandwich I get for lunch. Nothing like that waxy, butcher paper type of wing. Drives them Tee-lops crazy.
Ritz cracker wrappers are more for the 'end of year' hatches, like the Gray Drake, or Flav, where you need a less opaque type of wing. Sprinkle some dust on it, and you're ready to catch.