I was walking from Porto in May with a backpack, not planning to use a backpack service. On day 3 I injured my knee when I pulled some ligaments plowing through a heavy section of sand when the boardwalk ended for a while on the Litoral. When I woke up I knew I couldn’t carry my pack that day. Immediately I tried emailing both Tui Transport service and Camino facil. Initially Tui transport agreed to help me, but when I failed to see the email for immediate payment (we had been texting through what’s app) they canceled the service. Camino Facil came through and was very kind and dependable!!! Highly recommend them