A fantastic event in 2015. I entered on a 650 cc road bike and had a terrific time, whizzing round a variety of roads (A roads, B roads and lesser roads) in the night and then day. But, as shown, you don't need a big capacity engine; the bike class was won on a 223 cc Yamaha Serow.
As for the question and answer at each control, that's merely to prove that you reached the control. The alternative would have been to have 40 odd marshals sitting at each control through the night, then again through the day. It seems to be difficult enough getting marshals at the normal trials where they can at least see some of the action so marshals are going to be even more difficult to obtain for a scatter rally.
The roads are exactly as we would ride/drive on the Lands End Trial or the Exeter Trial so road tyres or knobblies are equally suitable.
I'm entered in this year's event on a 1,000 cc road bike so based on last year's results, I've even less chance of taking the bike class. But what an excuse to thunder across Exmoor and the Somerset countryside and meet up with like-minded people.