Staying at Carlos and Raquel's place is even better than a camping. You have all the camping equipments prepared when you arrived and can enjoy the garden and swimingpool. There is also a private kitchen and bathroom and 2 bikes only for the guests.
The place is located near Sintra and near the seaside. Perfect for the ones looking for a quiet place, close to nature. It's better if you have a car but it's also reachable by public transports (only a few buses per day so better yo ask for the timetable).
We had a really nice time there.