The first speedway meeting I attended was St. Austell Gulls first ever meeting at the Clay Country Motoparc as it was known. The Annear family brought speedway back to Cornwall for the first time since the sixties and the team was mostly made up of local grasstrack riders. Racing at Nanpean was always close in both conference (initally 'amateur') and premier leagues and the lack of home advantage often led to tense scorelines too.
The first post in this thread asks about revival attempts in Cornwall since the demise of the Trelawny Tigers at the end of the 2003 season. I remember there being local press about various potential venues, some even with noise tests etc being carried out only to be poopoo'd by local resedents. These included: Par Moor, the same area where the original St. Austell Gulls stadium and later stock car track was situated, now burried beneith the behemoth that is Cornish Market World (Par Market), St. Eval (near Newquay) was talked about for a while, Bodmin Rugby club was looked at as an option, there's the boarded Grasstrack at Victoria near Roche and most recently Fraddon has been in Focus.
To be honest, even with Plymouth being nearby, any venue in Cornwall that's close to good transport links or a decent road (or not - remember the roads to Nanpean!) could be well supported. I know it was before the economic downturn but St. Austell/Trelawny used to attract huge crowds.....