Manitoba regs are similar to Nebraska, only 1 fish 22" & up, except our #limit is 4 instead of 6 and we have a minimum keep size of 15" (38 cm). Is there no minimum size out your way?
Yes they're all walleye hawn.
It depends on the body of water you're fishing. Some have a slot size, some don't.
Same with limits. Most lakes in Manitoba are 4, but at Buffalo point where we were, the limit is 6 and there is no slot size.
We didn't keep anything bigger than 24" though.
Usually anything bigger than 26" you have to put back anyway.