Hi surfergirl! How wonderful that you have your Mother in your home! Especially since you describe your home as small. You have special blessings coming your way by being so caring!
I would suggest that the first thing you remember is: IT'S YOUR HOME! When people call and want to come visit - ask how many will be coming. If you feel that the number is too large, ask if fewer people could come. It really gets confusing to elders with dementia of any sort to try to keep track of who's there and who is who. I notice in my family, if there is more than one of us, Dad just sits there and listens to us talk to each other with very little input into the conversation.
Of course, if you want people to learn what it is like to take care of an elder with dementia, when they come over, let them know you will be back in 2 hours, leave them a list and have a cell phone with you to answer questions, but you will not return for the 2 hours. They may not do things the way that you do, but they will get a taste of what it's like to work with someone with dementia.
Its difficult being the caregiver, and unfortunately, the thank yous come much later. Love your Mother while you can, and love your family members that want to see her too.