Yup – I have ridden the tree top trail. Your handlebars can fit through most of it without issue. SOme points you need to stop and bounce to get round without dabbing.
The signs roudn the trail are now getting better – but whilst they highlight it is now the cycle trail – there are no signs to stop other users and that is because they are allwoed to use it. They do have small no entry signs on the reverse route at every stage.
Rode it yesterday (and got a puncture somehow – but I think that was from Verwood Forest) and it is bedding in much nicer now.
Best at night though, but it will be good in the winter when everything else in the area bogs you down.
Like a lot of the riders, I live in the immediate area so can easily get there by bike alone whenever I want – which thanks to work & family is not very often 🙁