Shalom and Greetings from Jerusalem! I walked during the last Holy Year 2010, doesn't mean much for the next one since the Camino is even more popular today. Back then the Camino was especially busy during Holy Week, over Easter, and those days just before and just after, Burgos, León and Astorga were packed, Monte Gozo even more like an army barracks. The final100k from Sarria was also very crowded. You are correct there will be many more pilgrims but today there are also many other and new lodging possibilities. No one had cellular phones back then satellite device but now you and everybody around you may be able to book ahead as you walk, Springtime on the Camino is marvelous as you see the bare vines in Navara sprout into full-blown vineyards as you walk along, the appearance of wild flowers on the hillsides including the protected primavera primrose, town/village gardens all are beautiful with tulips and wisteria. One suggestion, plan your itinerary by the guidebooks but stop just before the recommended stations-should all the recommended daily lodging in the town/village alberge offerings be completo pilgrims will mush on and not turn back. This may require a shorter day from time to time but will save anxieties. March/April is also snail collecting time, especially in Navara. You will see the locals out on the Camino and closeby with big plastic bags full of them - those lucky snails crossing the asphalt will be left behind since they are considered inedible. You will find them in your salads and your soups. Something to anticipate...or...perhaps...be forewarned. Buen Camino