last years APRIL pilgrims vs this year on the Norte

I can't give a specific answer to your question, but having walked the Norte last spring my experience was that I never had trouble finding a bed. Most hospitaleros are very well informed about the route ahead, so if you ask at the alberge what are your options for the next day they will tell you what the distanses to the next alberges are. If often boils down to a simple choice eg walking 15 km or 24 km. Equally, the tourist information in the towns can tell you your options. It may mean that some days you have to walk longer than want to or stop earlier but you soon get used to weighing up your choices and walking accordingly. The North is a great route. Buen Camino!