Yeah - I'd suggest you bring something to eat or drink - although it's difficult to go to the loo during recording. You'll have to stand doing nothing for a while.
Not sure about transport as I'll be driving. I know the way now. But come down for the day, size up where it is and maybe (as long as it's a nice day) go down by the river for a while. Then make sure you're in the queue by about 5ish.