As with every country at this time, COVID-19 virus is still present within the U.S. at varying rates in different parts of the country. Travel increases your chance of spreading and getting COVID-19. Delaying travel and staying home would help to protect yourself and others from COVID-19, even if you are vaccinated.
However, if you want to travel and participate in the program in the U.S. is important that you know that every state and every community has their own precautions in place, and varying local ordinances to keep community members safe.  On the other hand, vaccination is rolling out at an average of 1 million per day. If the country maintains its current pace of vaccinating people, about half of the total population would be at least partially vaccinated around mid-May, and nearly all-around early August, reaching herd immunity by the summer. That give us a lot of hope.
This map is updated regularly
https://www.nytimes.com/interactive/2020/us/states-reopen-map-coronavirus.html