I plan to visit Mt Vernon later this month and use a manual wheelchair to get around. My wife & I plan to spend most of the day there and take a stroll along the Mt Vernon Trail. Is allowing a few hours at Mt Vernon in a wheelchair sufficient and are there some tips for getting around in a wheelchair. Also, is there some insight into my taking in the Mt Vernon Trail? Can my car be left in the same parking lot to take in the trail? Thanks in advance.