Getting my bent rim fixed so I slapped on the spare. It is
Inflated to approx 34psi. Is that good enough? Only on for maybe
2 days and no hwy driving.

I usually set the spare to 65 psi. It seems the spare will drop about 3-5 psi per month just sitting in the back. I always have the Disount tire guys check the spare when I rotate/balance the tires.

I always try to move the spare tire to the rear. I don't trust one smaller tire on the front doing most of the turning, braking, and acceleration.

It should say on the tire and in the manual how much to inflate it.