Attendees of next week’s CTAM Summit needn’t worr about security headaches posed by the Democrats’ convention, which begins July 26. But they should budget extra time to leave Boston’s airport at Summit’s end. Behind-the-scenes impact from the exceptional security demands of the Dem confab will be wholly invisible to CTAMers, CTAM svp of marketing Seth Morrison says. The convention "doesn’t really kick in until the following Wednesday," a full week after Summit concludes, he adds. Moreover, Summit will be based at the Hynes Convention Center, a good 3-mile drive over Boston’s chaotic streets from the Dems’ HQ at the Fleet Center. Morrison advises attendees to give themselves an extra hour or so to pass through security at Logan Airport, which has been the subject of intense scrutiny post 9-11. "It’s the summer travel season, and everything’s going to be crazy," he says. "The city has already advised us that there will be airport delays. Plan accordingly."