 
   ) that'll get near the marquee.....
 ) that'll get near the marquee.....or as said, 2 leisure batteries in series and a charger would do at the other.....
or from the toilet block, just a 20m lead would do........
the leads are easy, I have about 75m of blue arctic cable on the van, I have a 16A ceeform plug.... and I'm sure in the next 11 months I can sort a waterproof socket
John





 I guess that means you'll have to get there early &  be the last to leave - bummer
  I guess that means you'll have to get there early &  be the last to leave - bummer  
  
 
 
 Or you could nip round to the Spread Eagle and whip a few of theirs
 Or you could nip round to the Spread Eagle and whip a few of theirs  