Well, if Guilin is the 36 hour pit stop, they might be having that suprise birthday party for the person on the production crew, mentioned at Narita airport.....or maybe just a secluded place for group meal. But it still doesn't explain the props. But maybe you are right......the morning afte pit stop.
Or how about this. M/L, T/V and J/C were supposed to leave Guangzhou at 8:30 pm. It is only a one hour flight. How come it shows them all leaving the airport in daylight? K/J were on the 9:10 and M/M were on the 11:10 I think. I think you could only do the detour at night. Just have to light the area. I dont think you could do the fishing. So as the producers, do you want them spending the night on the street somewhere, waiting on a HoH. Just maybe, they picked the all the teams up at the airport and took them to the top of that mountain for the waiting period. Then hauled them all back to the airport around 3 am, so they could be released in daylight at the same time interval and in the same order, that they arrived the night before. That way the whole day could be filmed in daylight.