I always take my sleeping bag everywhere with me but suddenly realised that this time maybe I dont have to. I am travelling in Eastern Europe and turkey. I am planning on staying in hostels the whole way so can i get away with a silk liner? Or should I take a sleeping bag just in case?
When are you going?
If you're going now when the temperature's up, you'll not need a warm one at all. But when hostels provide only torn linen, it can be nice with something "real" to sleep in - maybe an ultra-light one. Provides a little more comfort than just a silk liner.
I think if you are going to be staying in hostels for the most part and climate is not extreme, then you definitely dont need one. I used a silk liner for all my travels and i was delighted I didnt bring the bag - it was just another cumbersome thing that would have weighed me down.
Most hostels wont let you use a bag anyway, because it actually promotes the spread of bed bugs from hostel to hostel.
For tours where I needed a bag, such an Inca Trail or Salar da Uyuni or trekking in Patagonia, I was always either able to rent or borrow a sleeping bag, and it worked out fine.
And dont forget, if you DO find as you go along that you would rather have one, you can always just pick one up somewhere.
Good luck on your travels
Personally I only ever used a sleeping bag in Nepal on a trek, and even then the blankets were fine.
In hostels everywhere else I use a double silk liner. Really honestly it's one of my prized possessions. When on the road for a long time it feels great to have that one little luxury every night.
They adjust a little to your body temp, and are bug resistant.
Most hostels can provide enough sheets and blankets for you. Send me message if you'd like the name of nice place in Gorme, Turkey or Kracow that had good blankets