I am new to the club and this board and, in my browsing, I saw people talking about "add-ons" at properties other than their home property. How does one do this and what, if any, are the advantages/ disadvantages? I saw on e-bay a listing for 300 pts. at VB. We are VWL owners but really enjoy VB. I am not sure how to combine the points. I know I could look it up, but the plain language explanations on here are super and it is always nice to hear the voice of experience !