Disassemble the garland into 5-6 foot pieces. Even sedans are made to hold five humans without a trunk. Once you've broken the garland into these smaller pieces, place them vertically like you'd seat humans in the car. I've been able to transport at least 12-18 feet of garland in a sedan when I break it up like that. Remove larger 24" and 36" balloons to stuff elsewhere or in the trunk... or wait to inflate those on site.