If we find we need to use a stroller, we will be renting the Disney one. If we needed a tag for it, do they give you something we can attach/detach on our own, or would we need to visit guest services each time we rent a new one?
You may find renting one from off-site is easier, especially for hte bigger kids. They have larger ones that are more comfortable, and then you don't need to get a new tag every day in the parks.
Bring the information for off-site rental agencies with you. That way if you decide you need one, you can rent one while you are there. Bring more than one company's information in case the first one is sold out of the model you want.