We are preparing for a trip with son who has down syndrome- he has limited endurance and strength but lots of determination! On past trip we used stroller with a GAP but he is now too big for our stroller. We are wondering if it would be acceptable to bring small foldup stool/cane that he could sit on during long lines and parades. Not opposed to wheelchair but know that he will resist that and not sure how we will survive otherwise. Any other ideas?