Tigger, I'm not sure what room type you have, but it may be simpler to rent enough points for one,two three nights rental and allow the member to make the booking for you, instead of transfering points into your account ( I'm not even sure how that would work). I'm certain the two bookings could be linked so you have one contunuous booking in the same unit if that was what you wanted.
I don't know if you've thought of this, but at Easter the parks are going to be heaving, if you did decide to pay cash for a stay somewhere, staying at one of the Universal hotels for the weekend would give you front of the line access to the big rides at USF and IOA, I know it hurts paying cash for rooms these days LOL, but at a peak time it might be worth the extra cost to give yourself that extra access in the Universal parks (if you planned visiting them). A two night stay at Universal ( particularly at the weekend) might cost you $300-350 but if it frees up a weekends worth of points that's probably better value than paying $10 per point for DVC points and it gives you that extra privilage in the Universal parks JMHO.