Spot on Terry.
I'd like to differentiate between the main access track into a wood which is needed to get on site and park (as per dredgers original post) and perhaps what Simon is referring to, other occasionally used tracks further into the wood.
On the important bit where I have to get on site, to load logs, carry tools, park with visitors, etc, I want it as solid and weather proof as possible. Here I'm grateful for my scalpings, although even then, they need strimming as various herbs and grasses do grow on them, and with only a thin layer of soil on top you get 6 foot high weeds, where I watch the butterflies with my binoculars.
I don't drive large vehicles in any other parts of the wood, and wouldn't want to crush any plants, ferns or run over any of my deadwood heaps or little beasties, thats why I'm going to use a soft tired garden tractor to retrieve logs from the inner jungle only in mid summer, going along earthed tracks about 5 feet wide, which are more like footpaths. In the spring I stick to a path one foot wide, asking visitors to do the same, and don't deviate from it in order to not crush the bluebells and spring plants. I also refuse to do what many would, give the green light to contractors to send large vehicles in to fell the crowded oaks, wrecking the understorey and leaving it like a bombsite, instead I'll leave the trees where they drop and plank them in situ to minimise impact.
I care deeply about the ecology and flora of my wood (hence why I turned down a lucrative woodland wedding proposal), so respect where Simon is coming from. I treat the inner wood with great care and sensitivity, but recommend good firm scalping or MOT tracks with the main (minimal required) access track and parking area, nobody wants their jalopy grounded in a swamp and to be roughly dragged out by a tractor. Hope that clarifies my approach.