We are having friends over on Saturday for a picnic. Mom lives with us, and I know that Mom is not going to want to be there. Is it better for me to make her stay or to let her go up to her room. She has dementia, can't hear well, and can't see. I'm inclined to let her go up to her room and give her dinner up there. She knows the people coming, but I'm sure she doesn't remember them. It'll be 6 additional people in the house. She really doesn't do well in situations that are loud and confusing to her.
I think your mom will be more comfortable in her room rather than a room full of "strangers." She can come down and stay as long as she wants then go back.
If she wants, perhaps your guests can come up to her room, a few at a time, to visit with her a bit, so she doesn't feel left out and ignored.
More importantly, enjoy your get together. For me, it is a rare treat. Have a wonderful time.
I'm concerned though that she "can't see", and that her room is "up". Is she blind? Is her room on the second floor? I'd be concerned about leaving her there all alone while a picnic is taking place.
If the picnic is outdoors, can she just stay in one of the rooms on the first floor? And how would she communicate if she's alone but needed help? I'd address these issues as well.