As you might guess by the name, I am new to the BMI DC. I have 126992 destination miles to spend. I would like to take the family from LHR (2 adults, 2 children over 2 but under 10) to somewhere in the US this year. No preference, just a warm holiday resort. I have read all the guidance on booking flights with destination miles and I am a member of the ANA. I think I might be stupid, but it seems incredibly hard work! I cannot find any flights that appear to be applicable. I do understand that I need the ANA as a tool before calling the ICC.
With the amount of miles I have, can someone give me some guidance? I am better to book a flight in the normal manner and use the miles to upgrade to business or should I be looking to book as business via the ICC using part miles & cash?

Help!