I've done a lot of hiking and some biking but have not in a long long time done any camping. The luxury of flashing a credit card and having comfort and good food at the end of a day wherein I have not had to carry 20 kg has ruined me for the kind of bike touring it seems most people do. Hats off to you but it's not for me.
I want to do a tour from the Baltic coast of Poland to Budapest. I have not thought about specific points of interest or routes to follow. I see from Open Streets that there are relatively few cycle paths in eastern Poland but I also have read that the roads are often not heavily trafficked and that there is less tourism in general. So the absence of marked paths might not be limiting.
I've been around western Europe enough to have the sense that I will find a hotel or some sort of food and shelter in almost every town and that towns are frequent. In general every day can be organized to be somewhere accomodating. 25 km on touristed routes. 50 on less popular routes. In general.
The question I have for anyone with experience of the area is; how well the infrustucture developed in eastern Europe? What are the chances of finding a place to stay in Poland, particularly eastern Poland, Slovakia, and Hungary within a day ride distance? I figure a day ride in Europe to be 50 to 70 km.