Substituting Billy for Big Zero because they'll need his magic to get through this.

April 14th, crossing the river the supplies get wet. Lose one day.
April 24th, Nate has cholera.
April 29th, wait two days at Chimney Rock.
May 10th, Nate has a fever.
May 11th, lose trail, lose 3 days.
May 15th, find wild fruit.
May 16th, Cassie is lost. Lose 3 days.
May 24th, wrong trail, lose two days.
June 1st, rest 6 days at South Pass.
June 8th, Cassie has exhaustion.
June 12th, Cassie has died. Nate and Jonas go have a breakdown. Also damn it Cassie, you couldn't wait till we got to Fort Bridger? Kate and Billy find wild fruit while Nate and Jonas are having meltdowns.
June 14th, Billy has dysentery. Find wild fruit.
June 15th, rest 8 days at Fort Bridger.
July 12th, one of the oxen is injured.
July 13th, Billy has a broken arm.
July 20th, Kate has a fever.
July 28th, Kate has died. The health status said good!
July 30th, rest 4 days at Snake River.
August 6th, Nate has exhaustion.
August 8th, Nate has died.
August 13th, Billy has dysentery.
August 15th, resupply at Fort Boise. Rest 8 days.
August 28th, find wild fruit.
August 30th, Billy has cholera.
September 1st, stop to rest at Blue Mountains for four days.
September 5th, Billy is lost. Lose 3 days.
September 9th, impassable trail. Lose 5 days.
September 20th, rest 3 days at the Dalles.
September 23rd, take the Barlow Toll Road.
September 29th, arrived at Williamette Valley. Jonas and Billy are in poor health and have 537 pounds of food and 296 dollars. Jonas is going to go lock himself inside their new house and never leave.