cheap hostel with secure motorbike parking Istanbul and around?

[inaa]

Hello there,

i searched quite a time here, and now I ask this question again

Tomorrow we (one bikerboy, one bikerlady) plan to drive from Svilengrad (Bulgaria) to Istanbul. Therefore we think about taking a campsite or a Hostel (dormbeds as we want to stay cheap). We dont care if the hostel is a little outside the maincity.

So the question is, is it safe to park in front of the hostels. Or do you know one where we can park more behind the hostel?
Or maybe someone can recommend a campsite with near train- or bus station?
On the Internet we just found three campsites near the town, which ones are hard to find on our navigation-system

And another question: do someone did the same route and can tell how much the toll was? the roadtoll?

If I have overseen good and actual information about that theme please excuse. I would be very thankful for some help

By the way: we do have a little travelblog : tuckr-tuckr.blogspot.com