Yep, kind of a happy accident. :D
Hmm.. cycling in Serbia isn't really good, mostly unsafe... crazy car/truck drivers and almost without bike trails. I haven't had any trouble by now, but take care a bit more and you will enjoy.

Not sure what is a law in Serbia about wild camping, maybe it is forbidden but I did a lot of camping in past decade and never had any problem. Forest rangers are like mythological creatures here. It is rumored that they exist. :D But, expect a warm welcome from locals, especially if you go far in the wild.