The few times I have done this, I have knocked them out using a few good bumps with the BFH. Someone on here is probably going to shout at me saying to quit doing that, I'ma gonna damage bearings or some such, but I've never seen a problem from it.
Same here. They should come out without any huge amount of drama. New ones should probably be pressed in, but I have also used a heavy nut and washer to pull them in with an impact gun, just don't go over 100 ft/lb.
Pulling the rear axles out, or removing the front hubs is not a difficult job, and that being said, getting the old studs pressed out, and new studs pressed in is quite obviously the safest/best method.
