Sadly there is no easy way around your problem, short of starting your trip in Omaha, NB or Chicago. The only other solution that I can think of is to make arrangements with where you are staying to ship your gear to them ahead of time.

Do not show up at the station with your skies/snowboards as the conductor will not let you board with them. Most conductors are even enforcing the two carry-on bag per person limit, so they certainly won't take skies.