I use Concord Coach Line every year on my trip to the lake from Texas to Center Harbor from Logan. Concord Coach Line stops in West Ossipee, Center Harbor and Meredith twice daily with trips to Concord, South Station and Logan Airport. A round-trip ticket to Logan from Center Harbor is $55.00. Bus stops and picks up at all the terminals at Logan. Nice bus, friendly drivers and a relaxing way to get out of Boston. Check it out:
www.concordcoachlines.com. (no I'm not affiliated with CCL).