Answer #1 was "a horse."
I've read that horses were better for smoother roads and shorter distances. For pulling distances, they used oxen and mules.
This practice occurred for several decades surrounding "the gold rush" (assuming you are talking about the 1849 California rush) and was not motivated only by gold rushes. Throughout the 1800s, settlers settled all points west and sometimes travelled in wagon trains of various sizes. I don't know how many of their wagons would be considered "giant," though.
Horses, mules
I believe they'd pay to ferry across rivers, or they'd float their wagons across.
Carts, carriages, wagons, chariots
They traveled with either covered wagons (wagons with a semicircle frame on the top and covered by canvas material) or by handcart.
People usually used wagons. But many travelers walked alongside the wagons during the day.
Oxen. And BTW, you spelled immigrants wrong
Walking, ship, boats, wagons, horse.
The wagons carried all the settler's foods, clothing, blankets, as well as people who could not walk the trail during the day.
Conestoga wagons
Unlike most covered wagons of the 18th and 19th centuries -- which were usually just farm wagons with a jury-rigged canvas cover -- conestoga wagons were designed and built to carry heavy cargo across untamed country. A number of features distinguished them from other wagons of the day.They were larger than most other wagons, and capable of hauling as much as eight tons of cargo.They were constructed with an up-curving bottom, which helped keep the load together and helped prevent tipping of individual pieces.They had heavier, wider wheels than most wagons, and the wheels were usually fitted with iron rims for durability.They had tapered ends and sloping sides, resembling a boat, and when caulked for watertightness, they could be floated across water.
on pageant wagons.
Conestoga wagons