Taxis

So, the deal for coming this year was that we had to stay off-site in a proper bed (my poor neglected tent, although it's worked out quite well as we're staying for the rest of the week for a walking/snoozing holiday). However, I'm not sure I want to be ale free for the whole festival, I think that may make me die a little inside, so I'm looking at taxi options. I know there are a couple of firms around, but does anyone have experience of them and how far in advance I need to book (too late already?).

We're staying near Gilwern, which is theoretically cycleable, but as Mr T's feelings about cycling are similar to his feelings about camping I think taxis will be our only ale-related option...