Newbie here!Virgin Atlantic Rewards/Companion Flights

Hi there, newbie here looking for a little help if poss please!
We are busy accruing Virgin flying club miles from our VAA Credit Card (White), hoping for a family (2 adults, 2 children under 5) holiday to Orlando next year. Currently we have 61006 miles, and have now noticed that we have on the statement :
VAA Credit Card Companion Flight Qualification
VAA Credit Card Econ>Premium Reward Upgrade
How do we successfully use this to achieve the best price? (It expires June 2013). When is the best time to book (should we wait for a reward seat sale, would it need to be an Economy or Premium Reward Seat Sale, and are we able to use these credits then?). We are leisure flyers, and usually fly economy, although have the premium reward upgrade above - which would be nice!
Any tips much appreciated, thanks
We are busy accruing Virgin flying club miles from our VAA Credit Card (White), hoping for a family (2 adults, 2 children under 5) holiday to Orlando next year. Currently we have 61006 miles, and have now noticed that we have on the statement :
VAA Credit Card Companion Flight Qualification
VAA Credit Card Econ>Premium Reward Upgrade
How do we successfully use this to achieve the best price? (It expires June 2013). When is the best time to book (should we wait for a reward seat sale, would it need to be an Economy or Premium Reward Seat Sale, and are we able to use these credits then?). We are leisure flyers, and usually fly economy, although have the premium reward upgrade above - which would be nice!
Any tips much appreciated, thanks
