I’m not saying I did but someone told me that you could go to the state of Alaska government website, choose a vaccination site (of which there are many), sign up using a hotel address and phone number, and get pretty far into the registration process. It even allows you to select that you don’t have medical insurance. The only part I’m not sure of is if they need proof of residency in the state. It seems like if you could get past that part, you’d be ok. Not that I did any of that today.