hey goozer -
I’ve thru-hiked the pct twice in sandals. I never had a blister on either trip. Sandals are great & can even be used in snow with neoprene socks. In very cold conditions i’ve used wetsuit booties that had a velcro strap to sinch the top tight (found them in the Kennedy Meadows hiker box!)
The one issue that you will have to deal with is too much ventilation. If you hike barefoot in the sandals all the time, you might experience some severe cracking especially in your heels after a few hundred miles. I avoid this problem by using socks unless the conditions are damp. I also carry a bit of Bag Balm which is the best protection that i’ve ever used for dry skin issues.
One tip about sandals - i’ve found that wearing the straps very loose works best for me. You might want to experiment with the strap tension to see what works for you.
In terms of brands, I’ve been using cheap (and light) Teva “Hurricane” sandals. You can get them online @ Campmor.com for as low as $19.99! I’ve averaged around 750 miles per pair on a number of thru-hikes. Other sandal hikers rave about Chaco’s, but they are much heavier and more expensive than the Teva’s
Happy Trails!
freebird