I carried a silk sleep sac around for years, across 42 countries, and only used it a couple times. Never saw any bedbugs, and I stayed in some very low budget hostels and guesthouses; although I always did an inspection of the mattress and room prior to dropping my bags.

My flashlight also came with a red filter, allowing me to still see in the night, but was less disruptive to sleeping hostels guests.

Other items I carried with me for surviving hostels, were a travel clothesline (used this all the time) http://amzn.com/B0159BMLMO , ear plugs, eye mask, flat sink plug, and Kingston cable lock for my laptop.