Onsite camping is often permitted for open events, however for a bit more comfort consider one of the following options:
Holiday Inn Express, Leigh http://www.hiexpressleigh.co.uk
The Greyhound Hotel http://www.sportinglodgeinns.co.uk/leigh/
Travelodge Lowton https://www.travelodge.co.uk/hotels/489/Warrington-Lowton-hotel
If you need any vital boat bits, visit http://www.1stmark.co.uk/ who are just 10 minutes away.