Princes Harry (left) and William
10/18/2008 at 02:00 PM EDT
are going hog wild.
The brothers set off on an adventure Saturday, joining some 80 people on a motorbike ride across South Africa, from Durban to Port Elizabeth, over the course of eight days, covering a distance of 1,000 miles.
Sitting on Honda CRF 230cc bikes in their protective biker gear, the princes spoke to reporters about the trip that organizers have called an "endurance test" across rocky and dangerous terrain.
"It's not just a bimble across the countryside that's for sure," Harry, 24, said. "It's going to be very challenging and we're expecting to fall off many a time."
They will cross more than 70 rivers and the off-road trail is both "rocky and hilly," William, 26, said.
William, who begins training
in January to be an Royal Air Force helicopter pilot, joked about the river crossings: "We've got our arm bands in our back. We're ready to go."
Harry added: "We never really knew what to expect, but by the sounds of things – the talks we were given last night – I went to bed shaking and didn't sleep that well."
Harry, a lieutenant in the Blues and Royals Household Cavalry regiment, joked about spending time away from home with his brother. "We never really get to spend any time together," he said. "But it's great fun – well, I don't know yet, we'll have to tell you. We might argue [or] we might have a bit of fun. We'll have to see how it goes, but we're really looking forward to it."
"The pain of spending a week with my brother is well worth it," William quipped.
The trip aims to raise money for three charities, including Harry's own Sentebale
cause that helps disadvantaged young people in the African mountain kingdom of Lesotho, as well as Unicef and the Nelson Mandela's Children Fund.
2006: Harry starts his own charity RELATED GALLERIES:
See William's 20 PEOPLE covers!
See ALL of Harry's PEOPLE covers!