Re canoes - at Kerne Bridge commercials tend to launch between 9-10 am and 1.30-2.30.
Would advise anyone to use the Worcester car park as the parking at Bishopswood Hall/car park is now chargeable (this is all part of the development of the canoe launch which i wont get into yet but is the biggest issue in the parish). As Neil says, if coming from Kerne Bridge car park is on right just before a stone house on bend, by the bus stop - often the gate is closed. If you get to the garage/stores you have missed the car park.
DTs are now £10 - season is £40 (i think).