In 1978 I needed to get to Baglung in Nepal. It had an airfield but only two flights a week. The days on the outbound journey didn't work with my schedule so I flew to Pokhara on an RNAC Twin Otter took a bus and the walked for two days.
On the way back I hiked to the airfield (a grass strip on a peninsular several hundred feet above the river with nothing more than a hut). Checked in we then set about waiting. After a while we were told the plane had gone to Lukla but the weather had turned and it was stuck there. "It will come tomorrow". Nobody believed him so we hiked back to Pokhara and next morning went to get a plane back to Kathmandu. We saw it (another RNAC Twin Otter) being loaded with freight (mainly salt I seem to recall) and it set off for Jomsom. It came back an hour later, unloaded all the freight, we boarded and headed back to Kathmandu.
I'm not sure much has changed.