The pelts are still too rare (I've found) to farm in Hollowshade for my L33 Beastlord and I have spent months in that sodding zone. But if you must, I've found the best place is when the owlbears control the south. Just camp near a village and pick off the outlying 'fishing' owlbears.
The best thing is to check the traders inzone and nearby in Shar Vahl. Other people don't know what to do with them and sell them to merchants. You can then pick them up for a couple of gold each. Shadeling silk are easy to farm in The Pit, 40 silks in 10-15 minutes shouldn't be difficult. Just get pet to slaughter everything while you loot.
Cheapest way to tailor 80-135 IMHO.