Can get a day trip package to Ha Long Bay which includes pickup and drop-off back at Hanoi, rather than Hanoi -> Ha Long Bay -> Hanoi

Pickup only from certain hotels/ areas

https://www.tripadvisor.co.uk/AttractionProductReview-g293924-d17475877-Halong_Bay_Full_Day_With_Cave_Kayaking_And_Swimming_Highway_Transfer-Hanoi.html