Oh boy. I GOT plantar fasciitis on the Camino last year, and I wouldn't want to do anything that aggravated that! I finished June 24th. Every day my feet would hurt when I woke up in the morning, but would get better after walking around for a little while. I would just massage them periodically during the day and when I arrived somewhere to stay. I thought that when I got to Santiago and wasn't doing all this walking every day, the pain would go away.
WEEKS later, it hadn't, and I was getting frustrated because I had really wanted to keep walking a lot in my daily life after the Camino, and that just seemed ill advised with the foot pain that was going on. I read up on it and decided that I probably had plantar fasciitis, so I did stretches and things that I found online. That didn't help enough, so in around October or so I finally ended up a physical therapist's office. They confirmed my self-diagnosis and did massages and gave me more exercises. After a couple months of those appointments, it got a lot better, and they discharged me from treatment and said it would keep getting better. But lately it's gotten worse again. (Admittedly, I did back off from stretching multiple times/day once it had almost disappeared -- I need to bring that back.)
So here I am, nearing the date on which I started walking last year, and I still have plantar fasciitis as a souvenir of my Camino. I can only hope it's not permanent, but at this point, I'm starting to wonder if maybe it is going to always be with me, at least as occasional flare-ups.
I am in my 50s and not overweight. My pack was not excessively heavy, and for the couple weeks I did the Invierno at the end, I also had it transported because I wasn't up for also hauling water and food every day, along with the regular pack.
For the past several months, I've been wearing nothing but Hoka's, including to work. They're not the most professional-looking shoes and don't exactly go with my business casual attire, but I don't care. At least my feet don't hurt (or hurt as much). Oofos sandals are also really helpful. I had a pair on the Camino as my evening and shower shoes, and that was great. Now I am wearing them in the house because it hurts to walk barefooted or just in socks. They are expensive, but worth it.
Honestly, if you're having PF now, I don't think I'd do the Camino right now. It's going to get worse. Possibly a lot worse. I didn't have any additional involvement of a knee issue with it or anything like that, thank God. But I wish I didn't have this now, and I don't think I'd start a Camino with this going on.