Thanks lots for all the help.
Well mainly it was one of them that was stirring the stick to cause the trouble, but we all seems to calm down.
Whether or not they'll bring enough stuff, I've chosen that it's beyond my concern now. We have enough stuff now and I'm sure we have some backup stuff, like a second stove, and different firestarters. I did get the hang of the Mg firestarter (i was scraping at the wrong angle) and light it up in a cold weather with some rain, so that's not terribly bad.
I've learnt how to use most of my hardware (that needed to know the instructions) so I'm definately set.
And I was sorry that I've called them names above, and they're all fine and dandy with it now.
Whether I could trust my life to them, the time will come to judge, and althought I believed that they were not materially prepared, their previous experiences probably lead them to have some skills. On some points they're agreeing now, but I would not pressure them to get those things anyways.
I'm looking forward to a good trip and definately hope for an uneventful one

PS my neighbour had been there a week ago, and he said that it's not too cold in daytime and the place is real nice, so I'll enjoy it for sure.