Walker is the only guy out of the 4 7th round picks who I think makes the team this year IMO.
I'd be really surprised by that. Walker is probably the least ready of the OL guys they drafted, so even he's only a 50:50 bet to make the team out of camp.
I'd be surprised if Carpenter doesn't make the squad. He was drafted for special teams and there is literally jack squat for depth at ILB or S so there's room for him under either position group.