With regards to convoy etiquette etc. I would recommend sticking to speed limits (on the way there at least).
There are average speed cameras, fixed cameras and on saturday nights mobile cameras operating in Southend on a saturday night. Unless you know the area you may come unstuck...
It also attracts ALOT of stolen/uninsured cars, unlicenced drivers, general chavs/lunatics and therefore many old bill, in both marked and unmarked (sometimes modified to blend in believe it or not!) cars.
Of course this is just my opinion in an attempt to look out for anyone coming. It is ultimately your licence/car/insurance and I will definately not be lecturing or critisising anyone if they have some fun, or get pulled!
Usually there's plenty of quieter, less inhabitated areas for a bit of play that people travel to though...