I stayed in valcarlos mid-may this year. we were two pilgrims in the albergue and a third was carted in at about midnight by the police. it was a malaysian guy, I think, who was spotted still climbing to roncesvalles at 23h by some locals who alerted the cops who picked him up and brought him back to valcarlos.
the route through valcarlos village has been rerouted and now almost completely bypasses the village itself (and the fountain! in the playground), reaching the main road at the last restaurant (which was closed in may). the albergue is also not indicated from the route despite being practically above it.
when you finally drag yourself up that super steep climb from the torrent to the fronton, look right up to a (spruce?) grove and a big white modern building above it, with some stairs leading to it. the door on top of the stairs is the albergue door.
there is a code to get inside the albergue. there is a phone on the door for the hospitalero who speaks basque and quite incomprehensible spanish. I had to procure the help of two local teachers to get the code right. (it was the # that was giving us problems.) and then we discovered the door was open.
I liked the valcarlos route but it was also a lot on asphalt, especially the first part, with no grassy shoulders like on the orisson route. until valcarlos there were two more water spots (one at a farm before arneguy and one at the arneguy cemetery after the village) and the blocked sections have all been cleared.
the second part from valcarlos to roncesvalles was a lot better, even with the main road walking, especially the lovely path along the torrent after ganecoleta and the forest road before the steep climb.
the old fountain at the end of valcarlos was no longer operating and I saw no fountain in ganecoleta, but there was a working fountain after the big steep climb, on the main road, where the route leaves it for the last climb (not too steep but sunny) to ibaneta.
for me, the valcarlos route is more difficult then the orisson route altitude-gain-wise. yes, there is a lot of height gain on the orisson route but once you are up there, you stay there. whereas on the first part of the valcarlos route you constantly go up and down and up and down, and the ups are pretty steep. and only then you get to the main climb!
it is now recommended to descent from col de lepoeder (on the orisson route) by the road which is not that steep and offers safer walking.