Personally I would rather pick my heavy stuff up for shorter stretches, especially if there's more than I can carry at once. Can you imagine the chaos of her moving forward 20 feet and each person behind her having to carry two bags forward 20 feet and then run back for their other bag/pet carrier/baby car seat? Especially if they don't wait for each other? Or someone tries to help but now the helpee can't say they're the only one who's handled that bag? Dragging everything 3 feet at a time is hugely preferable.