I’ve ridden it wet a few times, My advice is to go prepared, i.e. wet weather kit/tyres, and take plenty of food/drink (as the burger van may be a no show, and riding in the wet/cold seems to fatigue you more IME) Ease into it, maybe ride some of the not so steep lines first to get your eye in…
The thing with Aston hill is that it’s got a mixture of surfaces for you to deal with, the loamy bits and some of the dusty (when dry) sections can still be quite grippy in the wet, but then roots and chalky stuff can catch you out and your grip just breaks away almost at random, and it takes a good couple of dry, warm days to drain the hill out properly I reckon, plus it it gets a frost on with lots of moisture held in the ground it becomes even less predictable, some bits will just have a sort of surfce crust of ice that once you get through you have some pretty good grip, other bits are just like black ice you can’t see it but it will cause a slip, then you end up actually looking for where the sun is falling to find part thawed ground that sometimes yields more grip…
And that’s precisely why you should ride it in adverse weather, to get you used to reading the trail conditions and it allow you some practise, to learn how to react to it all a bit better, I may schedule myself a visit there this coming weekend now you’ve mentioned it actually, just for a bit of a cack weather practise session…