Yep. Those oak pews get uncomfortable on my knee after a few minutes. I keep changing position ~ leg straight, leg bent...
But after sitting on the sidelines for three weeks, the first two watching from home on their live feed, I was more than ready to suck it up because I have the greatest guitar playing gig I've ever had. No schlepping all over, lugging gear in and out of clubs, drunks and late, late nights...
I do play on a stool, but I usually did anyway. And the band is nice enough to wait while I hobble up front.
Sorry you're not getting a respite from that back pain!