This is it.
We leave Bariloche on Sunday at 8pm and arrive in El Chalten on Monday at 11.30pm. There is no comfy coche-cama like the one we took from Buenos Aires to Bariloche, only a clasico bus, like any normal bus, and it's a dirt road. This morning a retired Israeli couple told me "ahh, bad road, bad road. don't do it". Thanks guys.
We'll stay in El Chalten for 3 days, go to El Calafate for another 3 and come back to bariloche -via Ruta 3- on February 7th.