We have a trip planned for the Fall for a river cruise in Europe. I am a little concerned about the amount of walking involved, but will take a cane and my walking sticks for negotiating the shore tours. I have found that taking long flights (to New Zealand and Africa) require an aisle seat, so I can get up and stretch every hour or so. Also if I have connecting flights, I request a wheel chair at the gate since there may be a long distance between domestic and international flights.
In New Zealand, we visited family and did touring on our own. In Africa, we went on a photo safari which was done on land rovers, sitting most of the day. All of these major trips were taken after my diagnosis of PD. One final note, take an ample supply of your medications with you as the country you’re visiting may not have your meds available. this is especially important in case of emergency delays.