Ask one of the swiss men (who has driven this vehicle in the swiss military) to drive. Please stay on the left (wrong) side of the road. That's how you drive everywhere in Indonesia. The adults and children in the back should try to have as much fun as possible. Shout as loud as you can if you want to say something to your neighbour, otherwise they won't hear you. You also hold on somewhere, so that you will not fly out when the vehicle hits a pot hole (and there are plenty of those in Papua)... :-)
As you drive, you should to wave and smile to all the Papuans you pass on the road. Of coarse they wave and smile back at you (from ear to ear :-). After 1 hour and 30 min of driving and bumping, you have reached your destination. If your muscles are still usable, try to jump out of the Pinzgauer. Unload all the food and drinks. Take out the indonesian orange sausages, make fire and grill them as much as you can, so they will get some taste... :-)
Eat, drink, talk and enjoy fellowship. When the kids are finished eating, let them loose to play, run, use the coal (from the fire) to do some indian painting and to fight like real Papuan tribal man and women... They will not bother anybody by doing it. You have arrived anyway almost to the end of the world. Well, as a good friend says, you can see the end of the world from there...
I am quite sure you would enjoy such a picnic!!! After you have had the last piece of cake, get ready to leave. Try to collect the right kids to take home. Tip: get the ones that might still have a corner of white skin somewhere. The ones who don't, are all Papua kids... You will have less food to take home, but there will for sure be less space for everybody in the vehicle. You will keep hearing all the way home: "That last piece of cake was too much"... Everybody is happy though. And the next day you will still think about it as you will feel muscles you didn't know you had...