A group of pioneers are on the Oregon Trail heading west. The group is led by Kenneth and Richard who recruited the pioneers and obtained all the wagons, oxen, and supplies.
The front left wheel keep breaking on the large wagon every month. There is an ox that seems to pull its muscles seemingly every time you cross into a new state. One of your best hunters who spent too much time at the Saloons in Northwest Indiana keeps getting dysentery.
Gerald, the patriarch of the group gets embarrassed that the group is taking longer than it should to travel the trail. He tells Kenneth and Richard they are no longer allowed to lead everyone. He appoints Christopher to take their place when they reach Idaho.
They stop at a little town outside Boise. Christopher would love to get rid of that faulty wagon wheel and get a new one, buy a brand new healthy ox, and find a hunter who is more dependable. Gerald tells him he doesn't have enough money left.
They only have enough to get a used spare wagon wheel, a mule in case the strong ox gets hurt again, and give hunting lessons to a young kid in the travel party.
It is less than ideal, but they only have to make it one more state before they get to their destination and can rid themselves of all the crappy stuff Kenneth and Richard purchased. Once they get to Oregon, they will be free to start anew.
Immediately after leaving town, the ox pulls his hamstring, the hunter passes out due to illness, and the wagon wheel cracks in half. They put the reins on the mule, hand the rifle to the young hunter-in-training, and replace the wagon wheel with the makeshift spare.
It is taking the group longer than most anyone has ever took to travel from Idaho to Oregon.
Three guys in the back of the travel party keep blaming Christopher and saying "he should have known" about the wheel, hunter, and injury prone ox.