Hampshire is a virtual no-go area for unlicensed raves.
Hanstpol don’t just bust you, they follow up with PEL prosecutions and surveillance of individuals and were one of the first forces to use confiscation and PEL prosecutions even before the CJA was passed.
In 1992 they were already clamping down and were known as the “ravekillers” (Thames Valley was lenient compared to them).
OTOH there is a large contingent of clubbers in Hampshire though (look on dontstayin, half the site seems to be from that area) and there may be some venues you could use. There was a guy called “The Rev” on here a while ago who is from Southampton I think – not that local but not too far away…