A super easy pattern is ripples, and, if you use a largish (I tend to use a J or K) hook and DC, should take much yarn.
I really couldn't find a pattern, so here are the basics. I use a repeat that is like this: 5 dc, [dc, ch 2, dc] in one stitch, 5 dc, skip two stitches, 5 dc, [dc, ch 2, dc] in same stitch. Right now I am working a baby blanket in Peaches N Cream yarn with a K hook. My base chain was, I think, 111 or so. One of these days I will figure out the pattern properly!
I hope this helps!
MissRach