That's a great thread that falcon posted! Have a good read. Everyone is different and different things work for them
I had terrible blisters when I did
Camino Frances. I am on the camino right now, and what has worked for me is 2 pairs of socks, a think liner sock and then a mid weight hiking sock. Initially that's all I had and I got about 5 blisters on my second day, 35km in the rain! None were too bad but after meeting 2 other pilgrims I gave their methods a go. First was Nivea cream, feet smelt better at the end of the day and it seemed pretty good. The next was more complicated, but the option that worked well and felt good (all bought in Spain pharmacy). First put on a cooling foot gel, then talc, then vaseline, but not globs. Repeat every 15ish kms
It works for me, maybe vaseline alone would be enough, maybe globs would stop me having to reapply every 15kms. I don't know, but it works for me
Maybe next time I'll try one of those body glide gels, but if I run out, back to Vaseline.
Some people don't like gels and they think the right shoes should prevent blisters, probably true, but I don't have the money or time to try and test dozens and dozens of different shoes, maybe you can in the US, but not Aus. Initially I didn't want gels either, but my method doesn't really leave your socks in a bad way, you can hardly tell you had anything on
Have a read of everything and choose what you think would be best for you. Let us know what you decide, and most importantly, how it goes
Best of luck
Buen Camino
Richie