Glad to see some fellow ravers on here. Been hitting the rave scene hard for years, and i can assure you the rave scene is still active globally - often with underground genres tho, e.g. dubstep was huge until 2004/5ish when brostep completely killed off its underground vibe and became the abomination we so often have blasted into our ears today.
If you don't like caning drugs, don't go to an illegal rave, is pretty much my experience of them. People with stolen medical canisters of NOS, dealers selling pretty much anything you want (varies by party... psytrance, acid/md, dnb generally ket/md). There's a fair bit of drugs in some particularly druggy clubs (cable some nighta, lakota in bristol for instance), but they still don't compare to an illegal rave. Lakota comes damn close though as it's generally ex illegal rave crews blasting out to an incredibly seedy audience.
Illegal raves are grotty, dirty, disgusting, and possibly the best experience ever. Where else can you cane a 10cm line of ket while out of it on MD then immediately wolf down a double balloon? Nowhere.