Deidre Lusby's holiday changed suddenly at 12.02am on Monday morning as she camped with 13 others.
"We had camped beside the river and were woken by tremendous noise, shuddering - the earthquake," she told Morning Report.
The group's guides decided move them along the river bed slightly and they bedded down on a tarpaulin in the open. But there wasn't much sleep to be had.
"Each aftershock set off another thunderous amount of rocks coming down into the river on the other side from where we were."