various comments:
would like to keep mostly to the walkers path if I can and will probably hit the road for the big uphills.
We've tried to make the distinction - this may be difficult to do. In many spots, the pilgrim path is simply too rocky for bicycles and, if you wish to persist, assume that your daily progress will be much less than if you had stayed on the road
the main diffrences. Is it less sociable?
When you are progressing each day, it may feel as though cycling is more solitary than walking
When you arrive at the albergues or in the small towns, you won't notice much of a difference
Camino "familys" of cyclists like there are walkers?
not likely here since you are progressing at about 3 or 4 x the rate of the walkers and each of the bike riders you meet is if a different ability and goal level
how often can one expect to have to do maintenance on the bikes punctures etc....-path if I can and will probably hit the road for the big uphills.
I rode the
camino frances last month. I rode 500 mi and didn't have one flat. The roadways in spain are in very good condition. Your bike will likely encounter more bumps and shocks if you stay on the pilgrim walking path. You should be familiar with how to change out flats and some basic maintenance on your own.
buen camino
hope this helps