For 2024 Pilgrims: €50,- donation = 1 year with no ads on the forum + 90% off any 2024 Guide. More here. (Discount code sent to you by Private Message after your donation)
I did not read any other responses, so sorry if redundant.
You could walk the Vasco. Starts in Irun and connects to the Frances in either Burgos or Santa Domingo de Calzada.
24 beds should be more than enough. I walked in late April and never saw more than 5 in any location.
In Fuenterroble make sure you shower in the main building. The solar showers are very cold.
Those are some long days. Some young folks I was with on the Primitivo walked Lugo to Santiago in two days. I walked the first 50km's Lugo to Melide but back to back 50's is over the top for an old guy like me.
You can also take the train.
Take the cercanias train from the lower level in T4 to Chamartin station. Then take the train from there to Leon. There is a Renfe ticket office in Madrid airport T4
This site is run by Ivar at in Santiago de Compostela.
This site participates in the Amazon Affiliate program, designed to provide a means for Ivar to earn fees by linking to Amazon