Lots of us ride the old fashioned way on old trials bikes and have a ball. The sections set for us have turns that do not require stopping or hopping. Bikes from the 1970s and 1980s are wonderfully suited to Clubman and C grade lines which is what Twinshock classes are usually run on.
I much prefer to ride old trials bikes because as well as being a reminder of my youth, I find them easier to ride than most of the modern bikes in the Clubman and C grade sections. Compared with old bikes, modern trials bikes require faster reflexes and shorter reaction time from the rider. If you don't have the reflexes you had when you were a teenager, you are on edge all the time, which is pretty tiring. Some modern bikes can be mapped to be a lot softer which is what old blokes do if they want to ride them well all day.
People who are experienced dirt bike riders but who haven't ridden trials look at an experienced trials rider going through a section and think it all looks so easy, slow and gentle, but when they have a go themselves, it feels to them like they are going all over the place and things are coming at them like bullets.
I thoroughly recommend riding trials to anyone who hasn't given it a go because it is great fun and very rewarding to feel your trials riding skills build very quickly. Do choose a suitable bike though because I see many people put off trials by initially trying to ride a trials bike set up for an A grade 20 year-old. It may be a challenge to many people's egos, but the lower-powered bikes are the best to learn trials on for even very experienced motorbike riders.
That Glenmaggie Easter trial sounds great - have been hearing about it for years. There has been an Easter two-day trial run near Brisbane for donkey's years too that is also very enjoyable. Everyone is so relaxed by the end, and riding confidence usually soars during the event too, after so much practice