Long Term Planning for BGI Trip

Hello
Looking for a few ideas to help with the planing of a future trip (Dec 2015) to Barbados.
It will be myself, the other half and our little one (2 plus)
Looking to book flights as soon as they are avx, which will be Jan 2015, at the stage I expect to have around 150K miles and the other half will have a much smaller amount. (We use both the Amex charge card, which gives miles plus bonus miles and the Virgin Black Card, as well as a little help from Tesco)
Have never used any of the companion flights etc with the cards
Planing to do 1 UC and 2 PE both ways to give each us time to look after the little one (travelled with a Niece in Upper last year and those seats are wasted on toddlers!) using Miles, however looking like we will probably be a bit short on miles.
Any other suggestions on how to ticket this journey.
Also if anyone has any recommendations for accommodation that would be nice, prefer self catering, stayed at Oceans 2 last time and found that to be excellent.
Thanks
Looking for a few ideas to help with the planing of a future trip (Dec 2015) to Barbados.
It will be myself, the other half and our little one (2 plus)
Looking to book flights as soon as they are avx, which will be Jan 2015, at the stage I expect to have around 150K miles and the other half will have a much smaller amount. (We use both the Amex charge card, which gives miles plus bonus miles and the Virgin Black Card, as well as a little help from Tesco)
Have never used any of the companion flights etc with the cards
Planing to do 1 UC and 2 PE both ways to give each us time to look after the little one (travelled with a Niece in Upper last year and those seats are wasted on toddlers!) using Miles, however looking like we will probably be a bit short on miles.
Any other suggestions on how to ticket this journey.
Also if anyone has any recommendations for accommodation that would be nice, prefer self catering, stayed at Oceans 2 last time and found that to be excellent.
Thanks