I've skied the otis from north lake to palenville after the blizzard of '93 and it was decent, although not very steep. The good thing there is that you can leave a car on top and at the bottom fairly easliy. Most areas are very overgrown and more trouble than their worth. Hunter and plateau can be alright near stoney clove if you are careful to avoid the big drops. You might also able to find an okay line or two near kaaterskill falls. I remember one which took me down to just above the fawn's leap swimming hole (Moore's bridge). Then again, I haven't done any of these spots in at least 10 years so the growth may have gotten out of control. You really do need a big snowfall to make any of it worthwhile though.