Any double umbrella owners out there care to chime in? I'm going to Boston for a few days and I'm trying to figure out if I should try to borrow one. I have a City Elite Double that's fantastic to push, but monstrously large and heavy, and a Graco inline double that takes the car seat and is not much better. I'm thinking a double umbrella is the way to go, but I'm worried we'll be using it the whole time and it won't push as easily as the others.