Thanks for your extensive reply with very helpful information (sorry for the delayed thanks - I didn't know you had replied, as I expected to get an email alert, but none came in!).I flew my Phantom 2 Vision Plus in Vientiane 2014 and Luang Prabang 2015. I had no major problems taking the drone into the country but one minor problem on the airplane flight itself.
In the pre-Mavic days, my drone backpack was quite large and though it would fit in the overhead compartments of a 737 or A320, most of the flights I took were smaller turboprop ATR-72s. The backpack just barely fit under the seat and definitely not in the overhead. An older French lady in the seat next to me wasn't happy about that.
In Vientiane I flew over the night market and the Mekong River. I rented a motorbike and flew at Buddha Park as well. No issues in Vientiane.
I had one major problem flying at a temple in Luang Prabang. My friend Sisouk was the CEO of Lao Treasure Group, which owned a bunch of hotels in LP and an elephant camp just outside. I created commercial drone videos for two of his hotels and the elephant camp, back in the days when aerial videos were still pretty new.
He drove me to a temple called Wat Phon Phao and asked the two tourism police stationed there if we could take some drone photos/videos. They weren't sure what he was talking about, so we actually showed them the drone. They said yes and I launched and flew. After I landed, they police came back to us and said we were to follow them back into to town to the local office of Ministry of Tourism. Turns out they didn't know what they had given us permission to do.
Drones were still very new back then and I think they just wanted to cover their butts. The Tourism Police treated us well. A cute, tiny, policewoman served us hot tea. I don't speak Lao so didn't understand any of the conversation between Sisouk and the chief, but in the end we were there about 45 minutes and had to leave the Phantom with them.
Once we were back in Sisouk's truck, he told me not to worry and called the Lieutenant Governor of LP. When he hung up, he told me we'd have the Phantom back in two hours along with a document giving me permission to fly anywhere I wanted within Luang Prabang for the rest of my three day stay. It pays to have a friend who manages eight hotels in the city and a direct line to the governor. Once I got the drone back and the blanket permit, my Phantom was all over that city like gap-year backpacker.
This was back in 2015. I haven't been back since, so please consider the staleness of this information.
The Mavics and Minis are much less conspicuous than the Phantoms. If I was going back to Laos today, I wouldn't hesitate.
My drone is a small DJI, so I shouldn't have any problem with luggage. I was just concerned that it might be taken from me on entry, but from your experience, it seems unlikely. I'll be heading to Vietnam afterwards, leaving from the same airport as I enter, so if the worst were to happen and they were to take it from me, I assume I'd be able to collect it when leaving the country.
Just one other question, do you normally take a fire-proof bag on the plane for batteries?
Thank you