I tried L&M once several years ago. When they tried to give me a Corrolla as a full size I questioned them on it. Thier repsonse. "It's a full size this week" When I pushed I discovered that when they get busy they "resize" the cars. This was President's Day week.
They also will make you buy insurance unless you bring proof of your home insurance, my Diners Card was not good enough for them.
I walked to Hertz.
You actually book MiniVans using Emerald Reserve. Works the same way as Emerald Aisle, but you go to the Mini Van aisle instead of the EA aisle.