Personally we gave up on Wales Rally GB about 4 -5 years ago after it got way to expensive, too compact a route, which meant loads of traffic problems. (4 hours to go 30 miles to the next stage) We also got turned away from the service area which we were entitled to enter.
So now we tend to go to Rally Monte Carlo instead. If there are 4 to split costs with, it works out cheaper than doing Wales Rally GB, as it costs nothing to spectate out on the stages. The weather and scenery is better too, plus we get to sleep in hotel rather than our cars.
Well worth considering though is the Roger Albert Clark Rally in November. This is run in the spirit of the old RAC Rally, with stages in Yorkshire, Kielder, and Scotland. Runs over three days starting Saturday 18th November and is for 2 wheel drive stuff only. Mk1 and Mk2 Escorts, Lancia Stratos, Mini etc.