Hi Wendy, I have just returned from my Portugese Camino which I walked solo in June/July. I started in Lisboa expecting the walk to be lonely and it was. I met a lovely Italian couple and two Americans along the way and it did happen twice that I was alone in a pension.It was a challenge to be all by myself and not meeting other peregrinos before Porto. At the same time I really enjoyed it, it was great just being me and being in charge. There are more kilometers between accomodation unless you want to check into a hotel, some days I walked 30 - 35 km in order to get to an accomodation listed in Brierlys guide. The accomodation would be a hostel or a pension at 10 - 15 € often including breakfast. Pensions also mean clean towels and bedcloths and possible the option of encountering a washingmashine like I did in Pensao Ribatejana in Vilafranca de Xira. It is possible to divide the long stretches into shorter walks, you can find information on that elsewhere on this forum.
After Porto I met other pilgrims, it was wonderful and I really enjoyed the talks, the laughs and the company. Maybe part of it was due to the walk without meeting other pilgrims.
I am grateful I got to walk solo out of Lisboa to Porto, it was a good experience and I'm glad I did it. I met so many friendly and welcoming Portugese people and never felt unsafe.
It seems like more people are walking the Portugese Camino, it is a beautiful camino and I will definitely do it all over again.
Buon camino to you and do not hesitate if you have other questions.