Can my relatives upload Memories to my Family Tree? Would they have to set up their own account, or would they be able to access my account to directly upload?
Each person would have to have their own account. They could tag memories to deceased relatives of yours but cannot directly add memories to your account. If they need your help, you can also tag the unloaded memories. The link below my be helpful.
Good luck to you all.
Here is a knowledge article that will tell you how this is to be done: How do I upload memories to FamilySearch?
The first thing is to realize that in the general sense it is not "My Tree" vs. "Your Tree"
You are accessing a collaborative database that we all share - and we can all access your ancestors and you have access to ours.
This is a great video that I suggest that really does a good job of explaining things:
WHY USE FAMILYSEARCH FAMILYTREE
whether is their account or your account - it is still a direct upload.
it will be relatively transparent as to who uploaded the memory - you will see all the memories uploaded by anyone for that deceased person.
to a large degree it may not matter who uploaded the item.
also some great tips related to Memories: