Hi L.,
First of all, I have to say that I read this post and cracked up laughing. I was mostly laughing because my child is starting this stage and is 2 on the 27th of this month. She has 3 favorite toys, but has now begun adding more every week. When we only want to take one toy with us, we tell her the other ones need to sleep or nap. This usually works to pacify her.
I have to say that I do not personally think it is a control issue. I have a couple of questions. The first is when she makes a mess with her toys, do you clean them up, or do you have her do it? I ask this because when we clean up dolls or toys for our children it can sometimes cause a fear that they are being taken away instead of put away. Our daughter sleeps in a great big chair in her room most nights instead of her toddler bed. She surrounds herself with stuffed animals in the chair. It is partially because she loves them and because it helps ease her fear of being alone.
I can understand that fear because, and you will probably laugh, but my husband and I both sleep with a stuffed animal still. LOL It just helps us sleep better. :) The second question is this, is there any reason your child would not feel safe and secure in her room? I ask this because if you are afraid, she will pick up on that because all children do.
I think seperating toys is a great idea as long as you explain it to the child. I do not think it should be a punishment, because you should not punish a child. You should only discipline a child because punishment generally comes from anger or fear and discipline is done to teach a child to know right from wrong and how not to get hurt and not to hurt others.
We have several toy boxes and a toy shelf all in different rooms. We explain that each toy has a home and must stay in its home. That helps our daughter realize where things go.In fact, soon we are going to gather some toys and give them away because she has so many. We plan for more children, but kids who don't have toys need those more. She will then see how important it is to give and love and share. :)
Another thing to consider is it is possble that she is doing this for attention purposes. Even if she gets negative attention, it is still attention. She is most likely pushing the envelope to see just how much she can get away with. This is very common, and generally a child calling a parent to discipline if needed. For example, you could allow her to pick certain toys to sleep with once in a while, and store the others elsewhere. That would teach her that she does not NEED all the toys with her, even if she feels she wants them, or that they need her.
Also, I will say that praying with our child puts her at ease. She never has nightmares or anything. If you are spiritual, that is something to consider. :)
Children understand so much more than any of us credit them for. You are a good mom and sound very devoted to her safety and well being. Trust your instincts because they will lead you in the right direction. :)
Blessings,
Katherine