Getting to the Hilton from the Airport is simple using the MAX Red Line
Follow airport signs to the train, buy a one-way, all zones ticket for $2.50 and ride until you reach the Pioneer Courthouse Square stop. Walk two blocks to the hotel. It's easy!
Or, if you prefer alternative transport, explore all your options here
You don't need a car to attend the conference as all events are either easy walking distance (less than two blocks), or in the case of the Opening Event, transportation will be provided. If you do bring a car, parking in SmartPark
garages would be least expensive.