There are 38 sites, with 1000 plots in total. Nearest to me (I live about three quarters of a mile up the hill from Four Lane Ends) are Sapling Road in Morris Green and Dealey Road or Manningham Road in Deane.
From the numbers, you can see that the sites are quite small on average. I know of 1 that has just 7 small plots.
We use the Tesco in Atherton as it's our nearest.