I have a Tepui Ayer mounted on Yakima roof rack which puts the bottom of tent at 6 ft off ground. I am 5'8 and 71 with not so good overhead arm strength. I went on first trip this w/e and struggled to get tent closed as some one parked too close to me to fully extend ladder to close. Am I correct that ladder must be fully extended to close? Any tips on how to get momentum to close if unable to open ladder fully??