I am planning to take the summer off from work to take a cycle tour of Europe of around 3 months, likely early June to early September. I post on the NYC Fixed Forum which has a few crossover members and figured this site might be a good resource with similar folks with more experience with Europe.
My route so far is pretty vague — I will have friends in the area of Barcelona in June, so I am thinking of starting in Portugal and doing a reverse-C across Europe and finishing at my uncle's in Thame, Oxfordshire, perhaps meeting my younger cousin at the ferry in Harwich and cycling the last bit with him. I am thinking of perhaps taking the Danube to the East, and getting myself to England via Copenhagen & Amsterdam & then to the ferry at Hook of Holland.
Any advice on favorite routes to cycle through Europe? Places to avoid? Countries where it is easy & difficult to load the bicycle on a train? Places or times it'd be difficult to show up and find a hostel or place to camp?