Thanks, Brambor, you can find the whole, planned route, including shortcuts, sidetracks and alternatives, on ride with gps:
https://ridewithgps.com/routes (all routes starting with TPXL)
As always, some parts turned out to be to hard to do with a bike (kilometer 15-21 off TPXL 16 and kilometer 63-68 off TPXL 20 Elizondo - Hermita) so I had to turn back and find a way around them. On TPXL 9N-b some roads were closed due to the mating season for deer, so I took a direct route from Coll de Nargo to La Pobla de Segur instead.
The whole trip took me about 6 weeks, including a 3 day stay in Barcelona, a 3 day stay in San Sebastian and a 2 day hike in National Park Ordesa y Monte Perdido, but it can be done in a lot less. (the trip has 21-23 stages with 1500 to 2000 meters elevation gain each)
To carry my bike on my back I simply strap it to my (nearly empty)backpack. This was the first time I tried, and it worked very well.