So, Una, I would be stunned if the albergue in Grajal is up and running by September. I was just on the Primitivo, where there is an albergue completely constructed in Castroverde (about 24 kms before Lugo) but no money to furnish it. But it is a different regional autonomia (Castilla y Leon as opposed to Galicia), so maybe it will happen!
So, I assume you will sleep in Villalon. It's a beautiful albergue, usually tended to by a volunteer hospitalero, and the town is a very nice place to spend an afternoon. Restaurants/bars and stores are other commerce. But for the next day you will have to make a decision to do one of several things:
1) sleep in the albergue in Santervas, about 15 kms from Villalon. There is a very nice romanesque church here, a statue to one of the conquistadores who was born here (can't remember which one), and a small grocery store. I think there may be a bar, but I'm not certain about that.
2) Continue from Santervas and sleep in the albergue in Melgar de Arriba. Info on this web page, scroll down till you see albergue:
http://www.melgardearriba.es/servicios.html . Melgar is about another 6-7 kms after Santervas.
3) Continue on to Arenillas, through Grajal (assuming there is no albergue yet in September) and then to Sahagun. This is what I did, but it is an extremely long day. Using option one or two would give you an easy way to break Villalon to Sahagun into two days.
Sahagun is on the
Camino Frances, as you know, and it's another 10 or so BACKWARDS to get to Moratinos. Reb has been known to take pity on us and come get us, though.
4) The alternative that Reb mentioned would get you out to the
Camino Frances at a point that is east of Moratinos, rather than Sahagun, which is west of Moratinos. That's the option described here:
camino-de-madrid/topic10639.html This is also a two-day walk. Unlike 1, 2, or 3, you leave the Camino de Madrid right when you are leaving Villalon. You then stay on the CL-611 (or P-611, I've seen it referred to as both), and in 18.5 kms, you are in Villada where there is a nice, rarely used albergue and a great restaurant called Casa de Comidas Pili (thanks Canuck). The second day, you have a 17 km day into Moratinos. The CL 611 will deposit you on the
Camino Frances in Terradillos de los Templarios, and from there it's a few (3-4) kms on the Camino to Moratinos.
I am assuming you've seen Reb's online CSJ guide to the Camino de Madrid, but if not, it's here:
http://www.csj.org.uk/guides-online.htm
I have some notes from my 2011 that complement or supplement those pages, and I'll send them to you. And if anyone else wants them, just PM me.
So how did you get so lucky to do two caminos in one year?????