trouble at home.

My dad is taking a trip to Wyoming for a few days for our so called "family tradition", which we broke long ago. Well this trip is costing us around $300 if not more, plus my "free education" is costing another $300. My mom is irritated that hes spending this kind of money when we're already having trouble paying the payments for his new truck and our ATVs.
The Bank threatened to repo the truck saying that we missed a payment, which didn't. My dad threatened to never do business with then again because they screwed up. the next day they apologised for the mix up and knocked off a few payments so we wouldn't go to a different bank. Even though that helped us a bit, we're still having trouble paying the bills.
And whats really making my mom mad, is the fact that he tells us not to spend so much money when he takes more trips with his friends. but it's not his ideas to go on these trips, it's mostly his friends and my grandma who keeps talking him into it. And yes, my granny is responsible for the trip to Wyoming.
She keeps saying it's a family tradition and we shouldn't waste time on other things. Now don't get me wrong, i love my grandma but she can some times be... selfish. Half my uncles and aunt's don't go because its to much for them as well and as for the ones that do go, well they just can't stand it.

Any way, I'm not going because i don't dare miss a day of school. and my little brother has school as well(Also his schooling is costing us too), so my dad is going alone. I know he just wants to have fun, but with the bills, the schooling, and all the basic living needs, this is just not the time.