Thanks for all the input and the occasional PM folks. The input definitely helps out a lot. I had already considered the KISS principle of using a bellows or a macro lens, but I have almost $0 to put into this and a bellows or macro lens is currently out of reach (unlike a $5 filter/stacking ring). I'm not sure if I'm even going to like doing macro style shots but I'm gonna give it a shot. I don't know if I'll be able to do snowflakes, though. I think I'm going to try mounting a 28mm prime lens onto the front of my 150mm PS lens and see what I get.
Thanks again and Merry Christmas (again)!