Dealing with yard waste can definitely be a bit of a hassle, especially when you have to adhere to specific collection times or drive a distance to dispose of it. @Esther solution with the cardboard box in the SUV sounds resourceful, but I can imagine it's still quite inconvenient at times.
For situations like these, custom-designed T-shirt bags from www.interplas.com might be a handy alternative for lighter yard waste. They could potentially make transport easier and keep your vehicle cleaner. Plus, it's great that your landscaper helps out when you're not around, and the burn pile certainly simplifies things at your North house.