Janas is about 20 minutes away from Sintra if the buses are running on time. Also, I went in the off-season, so the buses stopped returning to Janas at 1830, but an Uber was only about $8 and Carlos also offered to pick me up at another station and even once by the beach when I got stuck. He also picked me up from the station when I arrived because it was late, so don’t let the off-season keep you from visiting. Carlos’ recommendations were great, the place was clean, the bus was three minutes away, and the tent was warm. Bring flip flops for the pool and yard area so you don’t get dirt on the sleeping area.