I started in Montserrat May 20th of this year. The albergue there is free and they are very nice to pilgrims. Make sure you have a guide in a language you can understand because the book store there only sells guides in Catalan. I forgot my guide at home and thought I could buy one at Montserrat. Wrong. I had to make due until Lleida with a Catalan guide. However, I only got lost once because of the language problems. In Lleida I finally found a book store and was able to buy a Castillian guide, which I could read.
Between Montserrat and Logrono I only found 5 or 6 albergues. They were either free or 5 euros at the most. But the other towns had no albergues and I stayed in pensiones and hostales, normally for about 25-30 euros per night. The cost of lodging between Montserrat and Logrono is significantly more than for the rest of the Camino. From Logrono you'll find albergues for 5-8 euros per night.
The route through Catalunya and Aragon isn't as well marked as other, more common routes, so be careful, have a good guide (that you can read) and watch for those yellow arrows. I walked completely alone between Montserrat and Logrono, but this was fine with me; I really enjoyed it. Once you get to Logrono you'll have plenty of company so if you like solitude, enjoy it while you have it.
When you get to Castelnao de Seana you'll find one of the most welcoming and friendly cafes on the entire camino, The Cafe Modern. Make sure you have a couple of hours to have a nice dinner and good conversation. Please tell them DeMar says hi! I think I was there May 25 or 26. I lost track of the days for a while in that region.
Buen cami!