I am using a TA as well but for Hotel Accommodations only. Maybe this is an option for you. My TA is more than willing to help my guests find flights, but she actually advised against group packages that included airfare since I have guest flying from 6 different states, and with varying travel dates (I have guests staying for 3, 5 and 7 nights). In the event that I find a cheaper rate, my TA offers price matching. However, I don't know if this would apply if I had a packaged deal that included airfare, but maybe it's worth asking this question to your TA. Airfare can be tricky since prices can fluctuate drastically for various reasons... gas prices, day of week that your flying, how far in advance you book your trip, the city that you fly from etc. I don't know if these factors are considered when a TA calculates a package deal, or if these factors even apply to you.