You can get them at Wal-Mart, Academy and maybe even Lowe's up there with out having to drive to Bass Pro.
Just put the trailer on your truck, place the jack up to where you think you want it, collapse it horizontal to ensure it won't hit the truck, then its usually either 4 separate nuts/bolts or 2 "U" bolts/4 nuts to tighten down.
That's about it. Main thing is get it tight and to where it won't hit your truck when collapsed for travel.