Specifically, under the communist governement at the time; could foreigners just fly in ?; was there a 'permit" required to enter; would Americans have an "escort" or be free to roam during those turbulent Solidarity years?
The first Solidarity times, until martial law, are sometimes called the time of freedom. Censorship was curbed substantially, the party members seemed lost and scared, secret services tried to avoid open confrontation.
So, there was a great chance that an average American visiting Poland at that time was left alone and could do what he/she wanted.