This is pre pandemic but we did the Mandalao elephant experience. It's not elephant riding that is not permitted anymore but you feed the elephants and do a walk through a forest like setting. You are given some rubber boots to wear on the trek. You also have lunch on the property. We had previously done the elephant riding in Thailand and it's not the same and understand the concerns about the animals. I think the lao experience was still worthwhile.
We really like luang prabang. No chain hotels in town or fast food restaurants. Local places to eat and friendly people It's a nice slow pace. Climb the hill in town after the alms ceremony and watch the sun rise.
Foot massages are inexpensive and plentiful after a day of walking around its a great way to end the day