Do you mean the Welsh Rally or the GB Rally of Wales?
If the latter, I definitely wouldn't bother. It's massively overpriced, chav-ridden, the traffic is beyond ghastly (reckon on queuing for about four hours to get into the stage) and the is action mediocre at best. You'll either get soaked or covered in dust yet be well back from the action. Anyway, the cars aren't all that if you ask me, not when youve seen Grp B in action. Compared to the wonderful old-time five day long RAC rally, it's a pathetic shadow of it's former self, like cutting Le mans down to a 1000km race on the Bugatti curcuit.
ah the good old days.. old timer i am starting to sound... we used to follow it around in the late 80's, being lowely students that we were, were camping in our Mk2 Escort. really great community spirit, a bit like le mans, but on a colder, smaller and more mobile based. Being feet away from the 6r4, and the amazing Rs200 is one sound and view which still causes the hair on my neck to stand on edge. 5 quid a stage entrance, bargain by todays prices.
as above, i wouldn't bother - its overpriced and overpopulated. Be aware, that its a rally, you will see the cars for a brief second, especially if you go for a walk through the woods. If you must, i think the best option are the "spectator stages" where you see the cars for a longer period.