One word of caution about using ePlus on a II exchange booked with WM credits. A ePlus rebooking is essentially cancelling your existing reservation - returning the credits to your WM acct, and then a withdrawal of credits from your acct for the rebooked reservation.
The problem is that the new reservation quickly withdraws credits from your acct, while the cancellation takes days - sometimes weeks - to redeposit the credits to your acct.
So if you are without enough credits to book the new reservation, then WM will do a FAX rental to fulfill the credits needed - and will charge you either 8 cents or 15 cents per credit.
And sometimes the cancellation credits never come back into your account. So you need to monitor it closely. I have had this happen and am still fighting to get it sorted out.
Also they will never borrow a HK token on a II exchange, they will bill you for one if you dont have one in the available column. So if you dont watch the mail and pay the bill - your acct can easily be suspended. They will not just bill your credit card on file - they will just send you a paper bill that you need to pay.
On the plus side - if you do a retrade within 59 days - then you get it the unit at 4k credits. If you upsize the unit outside 59 days, you will be hit for whatever the credits required for the larger unit. So if charged 8k for a 1BR reservation, and you upsize to a 2BR at the 150 day mark, you will quickly see 10k credits withdrawn from your acct, and 8k credits deposited with a few days/weeks. Within 59 days, you would see 4k come out and 8k redeposited.
Obviously none of the above applies to your Aulani resort, since Disney is RCI only.
And the trading power concern that VacationHopeful mentions is true, but not for WM. WM is a top trader with II.
