You could do this with dynamic thank you pages. The lead would choose a State and submit the form, and then they'd be taken to the follow up page you set up for that State. The article below has all the info on how to do this.
Yes, you can use routing login in the form so that when the select a state and click submit it is routed to the correct page.
In the form go to form setting>Setting Thank you page area
Thank you! I've done thank you pages so I should be able to do it.