I've been to Daocheng/Yading NR, Litang etc after traveling northern Yunnan province(Shangei-La , Yubeng etc)
but now i don't a bit understand what you say (i'm not good at English)
>Is it possible to arrange that late in the day to Yubeng and super early from there, so a late arrival,
early departure from Daocheng to different destinations (from Shangri-la and to Litang) would be possible on the same day?
so i'll write informations i got in my traveling
and i don't know whether those are useful for your traveling.
*Bus from Shangri-La to Daocheng---08:00am/required time is about 10 hours
*in Daocheng, every morning, beside long distance buses(to Shangri-La, Kangding, chengdu),
many shared minivans(or jeeps) going to Yading, Litang etc are waiting guests around Daocheng bus station since very early morning.
*Daocheng to Yading---110km. about 3 hours by shared minivan.
*Daocheng to Litang---150km, about 4 hours by shared minivan.
*Accommodation at Daocheng
---i've been to Daocheng 2 times and every time i stayed"Yading Backpackers' Iternational Youth Hostel-Ⅱ,
and in Daocheng, there are 3 more International youth hostels and several youth hostel type guesthouses i saw
but i don't know well about actual condition and atomosphere of them.
*for going to Litang from Daocheng, you can take shared minivan or jeep and also can use big bus going to Kangding, Chengdu
and get off it at Litang.
*If you want to go to long distance destination from Daocheng (Kangding, Chengdu, Shangri-La) directly ,
you need to ask your YH's or GH's manager to book your bus ticket (=to buy your bus ticket for you)
just after arriving your accommodation because it's very difficult for you to buy your long distance bus ticket for yourself
because many local people who are waiting open time of ticket booth of bus station rush to ticket booth
and its strugling is very severe for foreigners.
*Youth Hostel in Daocheng(i've stayed all YHs ①-④)
①"Yading Backpackers' International Youth Hostel-Ⅱ"(亜丁人社区-Ⅱ)---i think this YH is the best accommodation
--with beautiful open type flower garden and clean rooms(dorm & private rooms)
---Address: Jinzhu town, Daocheng, Sichuan/Tel:0836-5728994 (Wifi--OK)
②"Yading Backpackers' International Youth Hostel-Ⅰ"---same owner to YH ① and also good.
③Daocheng MaMa International Youth Hostel
④Daocheng International Youth Hostel
*Guesthouse at Yading (village)
There are many hotels and guesthouses at Yading village and i stayed "Yading Dengba Guesthouse".
Dengba Guesthouse(登巴客棧) is a guesthouse chain and has many YH type guesthouses in northern Yunnan & western Sichuan----Dali, Shangri-La, Lugu lake, Xichang, Daocheng, Yading, Xindugiao, Tagong, Danba, Kangding, Chengdu and many other places.
*Yading Dengba Hostel(亜丁登巴客棧)---Address:Yading village, Riwa town, Daocheng/Tel:13320798550 (Wifi--OK)
If you stay this guesthouse at Yading village,
GH will send you(=their guests) to the starting point of Yading NR trecking couse
and if you call guesthouse when you return to the starting point by telephone ,
GH's minivan driver will pick up you to your guesthouse from there. (it's free charge).
PS) As for treckng course of Yading NR , many electric cars (=golf cart type) run along trecking course
and almost(99%) Chinese travelers used these electric cars without working but all of them missed amazing scenery & great nature so i walked all the way to the final point of trecking course and back to the starting point.
*walking--1h30m~2h(very slow pace with taking photo)one way
*by electric car(07:00am-18:00pm)---19 mins one way (taking photo is prohibited)
*If you want to go to "Milk Sea"and "Five Color Sea" by horse back or walking in a day at Yading NR, at least taking eleectric car for one way is better but i don't recommend both of go & back because Yading NR is not a Deasny Land though it's alike it and scenery is quite alike a tytle scene of Palamount Movies.