Steph is right... it does vary from owner to owner, but most importantly it should always be the guest who has the final say in whether they want any decorations that the owner may be able to supply.

If you are on an Allocation Upon Arrival package deal, it will be nigh on impossible to establish if there are going to be decorations, as the company your package is through wont know where they are placing you until you arrive.

If you have booked direct with an owner, say through any of the Orlando Villas sites for example, you can simply call the owner and ask. They will be delighted to assist you I'm sure