Jaka
We took a 2D / 1N tour that took us from Luang Prabang to Kuang Si Falls, then to Manifa Elephant Camp on day 1. Day 2 was Elephant (Mahout) Experience in the morning, then Pak Ou Caves and Whiskey Village in the afternoon, plus return to Luang Prabang by slow boat during sunset. This trip was worth every penny.
The Elephant Camp is awesome. The rooms are nice and comfy. The staff treated us like royalty. They cleaned and filled the jacuzzi for us, and cooked an amazing steak dinner.
We had a lot of contact with the elephants. No elephant is mistreated there. If anything, I would say they are spoiled. The Mahouts guide the elephants with words only. We were able to ride and bath the elephants, then bring them to the jungle for the night. The next morning, we went to get them from the jungle, then bathed them again. After that, we were free to wander around the camp to search for elephants and to feed them as many bananas and sugar cane as they wanted.
The guides we had before and after the camp were nice and spoke good English. Mr Ping Pong was very friendly, funny, and informative.
In my opinion, the 2D / 1N package is the best way to enjoy all these activities. Doing them separately would have been disappointing. Spending the evening and morning at the elephant camp gave us enough time to appreciate their presence.