PDX is the airport in Portland to fly into. There are many direct flights from NY and Chicago, as well as other places you may be traveling from!
Skibowl and the hotels/cabins around it are about an hour drive from the airport. Renting a car to get there is the best option.
If you're making a longer trip to the PNW, you can always stay in Portland for a few days before or after, and rent a car just for the wedding dates!