My FH and his family has been having a difficult time lately with his aging grandparents. Unfortunately, one of his grandfathers is struggling with advanced Alzheimer's and about 80% of the time acts like a 6-year-old. FH and his family have been very patient and accommodating with the advancing of his disease, but as our wedding gets closer, I'm beginning to fear that FH's grandfather might not be able to attend. We both definitely want him to be there and have family photos taken, but we're at a loss on how to take him into an art gallery (location of our ceremony/reception) without be disruptive and a threat to himself, so to speak. I'm really asking for any thoughts or advice on what others might have done in this situation with elderly family members? What can we do to have him be a part of our day?