Jeremy from Indiana
I think this highly depends on the state. Some states don’t go off of your registration status in other states. For instance: My state of Indiana says if you were convicted of the same offense in another state (or an offense substantially similar) you are required to register in Indiana if you live, work, or attend school here. I’ve researched other states and most of their statutes say something similar.
It will take some research because a large amount of states (Indiana is one) have also declared the registry as punishment, although Colorado is the first to attach the eighth amendment to that. If your claim is that of ex post facto, then you shouldn’t have to register in that state you’re visiting if it’s been declared punishment there, but if your claim is on eighth amendment grounds or due process grounds, you probably will, at least for now.