Hi Greg,
I rode around Europe last year, I had only past my bike test 6 months but had to go.
Never encountered any problems but was only over there for 8 days to do 7 countries!
Caught the boat back from Bilbao in Spain to Portsmouth and had no problems in Spain.
I loved the passes, Stelvio pass Italy, and the well known Grimsel pass through the Alps, try to do these if you like the scenery.
And just remember dont pack to much! it just weighs you down just the bare minimum.
If i can help you anymore let me know, glad to help but can only go on my one previous experience.