Nepal opened the Kanchenjunga area to trekkers in 1988.though people have trekked in the area in connection with mountaineering expeditions since the turn of the century. Kanchenjunga is a long way from Kathmandu, and the nearest roads and airports are a long way from the mountain. You cantrek either to the north or south Kanchenjunga base camp, but it takes luck, determination and a lot of time to visit both sides of the peak .The northern side is particularly remote; it takes almost two weeks of walking to get to the base camp at pang pema.
Kanchenjunga is on the border of Nepal and the Indian state of Sikkim, so a circuit of the mountain is politically impossible. The next best alternative is to visit both the north and south sides of the mountain from the Nepal side; you need to be equipped for a high pass crossing and have a minimum of four weeks. If the pass crossing does not work, then it's a long way around.
since the region was opened,only a few groups have made successful crossing of either the lapsnag La Bad weather and snow is often to blame, but more often it is simply a lack of time. Many trekkers have wallowed around in the lowlands near teplejung because they miscalculated the time required to reach the high country.Unless you have at least four weeks, and preferably five, you should plan to visit either the north or south base camp, not both.
If youcan get toTaplejung by either road or air, the trek can be shortened by four days, making it a bit more resonable.

North Kanchenjunga Base Camp

South Kanchenjunga Base Camp