I remember when they got relegated from the Conference....went in the Isthmian League, which was essentially a London suburbs league, rather than was it the Gola League, a more southern/midlands based league. They then used only London based players, just collecting them for a bus to Somerset for home games....not sure what they did about training presumably London based a couple nights a week.
My mate who used to coach for Yeovil back then (Paul Randall ex Brizzle Rovers) said that the club employed a coach/assistant who lived in London and he hosted one training session in West London per week and one training session in Yeovil per week.
Seemed to work for them, why the League thought they were better off in basically a London league though still wrangles some fans, partly because people of Yeovil have little time for Londoners/cockneys, they have an inherant mistrust of all things that there London.