http://www.guildwars2-crafting.com/farming-guides/silk-scraps-farming-guide/

Silk Scraps Farming Guide
This Silk Scraps farming guide is made for players who want to farm instead of buying directly from the Trading post. I’ve made the most efficient routes to farm specially those items with no hassle.
**Important: Remember to bring with you a Salvage kit to use on salvagable items.
Tips:
You will not be able to farm again these routes for the next 24 hours (Respawn time) or after a server transfer (7 Days cooldown)
Hold your Left Ctrl key to view all friendly npc such as trees & veins
You earn experience from gathering items
Frostgorge Sound Level 70-80
There is a lot of “Son of Svanir” in that area and it is a very good farming spot for Silks Scraps and Intricate Totems. I highly recommend Journeyman’s Salvage Kit if not better for salvaging.