Quite a lot of areas around the downtown area have very deep gutters with quite a step up onto the pavement. There are also areas further along which are not so deep so if you are having trouble walking, choose an area to park where the step up is normal. Some of the paving is also in need of repair.
While Scarborough Faire is open through all weathers, don't bother going when its raining. The carpark especially turns into a mud patch but also the whole of the grounds are just that - grounds, no paving.