Before getting into specific suggestions, there are few points to keep in mind:
Practical guidelines for going out together:
Don’t make a big deal of it. The person is probably anxious, and to plan as though you were preparing an invasion will make him or her more anxious. How much planning and structure is required varies from person to person and will probably change over time.
If you are not familiar with the place you plan to go, go ahead of time to case it out. See which areas will seem confined, find the exits, ask about times when it is not too crowded. Know where the stairs are located in case escalators or elevators are a problem. Being able to tell the person you know the area may make her or him feel less anxious.
If the person wants you to stay with them do so–like glue. It’s not his or her job to keep an eye on you. It’s your job to keep your eye on her or him. If your companion wants to hold your hand or suggests you stay a few feet back from them, do what she or he requests.
Always have an agreed upon central place picked out at which to meet in case you accidentally become separated. Once it is obvious you have lost the person go directly to that spot. Do not waste more time looking. He or she will feel more comfortable if she or he knows you will be there.
If the person wants to leave you for a while, set a definite time and place where you will meet. Don’t be late. It is better to be early in case he or she arrives early.
The only responsibility with which to charge your companion is to let you know if she or he feels overly anxious or panicky. Frequently you can’t tell from just looking at him or her.
If the person indicates that she or he is becoming anxious ask them what they would like to do–take a few deep breaths? sit down? go to a restaurant? leave the building? return to the car? A break may be all that is needed for his or her anxiety to diminish. She or he may want to go home or return to the place you have left. That is up to him or her. Ask the question but don’t push.
If your companion has an unmanageable panic attack lead her or him from the area to a place where he or she feels safer.
Don’t add stress by giving the impression that there is something YOU must absolutely accomplish before returning home. The free permission to return home at any time is now gone.