How did a retiree smuggle about 1600 pounds (800 kg) of guns and ammunition into a hotel room in 3 days?

22 guns, 10,000 bullets: How a killer got his arsenal of firearms into a Las Vegas hotel

Update 10-5-2017:

 47 guns loaded high-capacity magazines found in Vegas shooter’s hotel suite and Nevada home

Las Vegas Shooting: Multible shooters, the evidence