[Lijahsbubbe]

They must not have had any place to take shelter or they didn’t get a warning.

Maybe they just had cabins?

[Strategerist]

Apparently had about 12 minutes from the NWS tornado warning.

[LibertyRocks]

Here are some of the details about the facility from the Mid-America Council page:
http://www.mac-bsa.org/index.php?Itemid=80&id=92&option=com_content&task=view

The Little Sioux Scout Ranch is approximately one hour north of Omaha, Nebraska in Iowa’s Loess Hills. The 1,800 acre ranch is approximately 15 minutes east of Interstate 29 off the Little Sioux exit (#95). Six hiking trails through narrow valleys and over steep hills offer a myriad of views of this pristine, heavily timbered ranch.

Campers have a choice of several mowed meadows, with nearby frost-free water hydrants and latrines or several remote campsites. Four cabin shelters are also available year-round to camping groups. A 15-acre lake is available for boating and fishing. A rifle range was recently added.

[Jet Jaguar]

possibly sea-huts or tents.

Long time ago, but I only stayed in a cabin 2 times.