Is there a cost for that?
Annual membership is $89, less per year for multi years. The trade fee is $199. I believe your week is a 3 bedroom. Even if you trade for a smaller unit, same fee and a one to one trade. Others who trade for larger units have to pay an upgrade size fee.
Three bedrooms highly rated like yours trade extremely well in II. If available with an ogs you should be able to get your requests. There is no week combine like rci to bump someones value so your value stays real. II concept is like for like. The value of your week bumps you way up in the front of the line. Someone putting a request in earlier then you with a weaker week will not get it, you will.
They also have a request first feature where you don’t relinquish your week unless a match is made. You can use request first up until the date of your week. To search further out you would have to deposit. With request first it gives you the option to put the points into hgvc if you don’t get a match.
This year I used my hgvc affiliate at surf club at Marco Island to trade in II for the same week in Marriott’s Crystal Shores at Marco Island for a 3 br.