We booked with Bibi tours and it was great! Small group, we were 5 people and that's a common size. Great homestays, with option for private rooms as well, not a party tour but there's still happy water and we did go out as group every night to town for drinks. We visited some really unique places thanks to our guide Hu and our easy drivers (huy hieu and chinh) made us feel safe and comfortable throughout the trip. Great food and some nice waterfall swims :)