couple of questions about upgradeable seats V reward seats

I've got a couple of questions about which way is the best to book my seats (trying to save extra cash so we can have an extra 3 nights in resort).
1) Can you book economy seats with a package deal with Thomas Cook, then use your flying club miles to upgrade to PE seats (firstly checking with VA there was availability)?
2) Are package deals always cheaper flying out of Gatwick to Barbados rather than out of Manchester?
3) If not using TC - and booking myself - Am I better booking "upgradeable" economy seats with VA then upgrading to PE using miles or just booking PE seats with our miles (I will have to purchase a few extra miles 1st doing it this way). Thinking of cost with this question.....which option will be more cost effective...
I wouldn't normally book through an agent but a friend works at Thomas Cook and she is getting me some decent prices at the moment...
sorry for all the questions - just trying to get the best deal I can.....Aren't we all
1) Can you book economy seats with a package deal with Thomas Cook, then use your flying club miles to upgrade to PE seats (firstly checking with VA there was availability)?
2) Are package deals always cheaper flying out of Gatwick to Barbados rather than out of Manchester?
3) If not using TC - and booking myself - Am I better booking "upgradeable" economy seats with VA then upgrading to PE using miles or just booking PE seats with our miles (I will have to purchase a few extra miles 1st doing it this way). Thinking of cost with this question.....which option will be more cost effective...
I wouldn't normally book through an agent but a friend works at Thomas Cook and she is getting me some decent prices at the moment...
sorry for all the questions - just trying to get the best deal I can.....Aren't we all
