Getting to the ground
The ground is a good 15 minute walk from the station and town centre. For those driving down there's a car park at the ground. It'll cost you 6 quid and no doubt you'll be stuck there for ages at the end of the game. There are also various small businesses along St Andrew's Road that offer parking for a fiver. Better though if you get there early enough is the Gas Club car park on Gasworks Street which is only 3 quid. Street parking is more or less non-existent around the ground, but a couple of areas you could try are marked on the pub map. One of them is very handy for the Slubbers Arms, one of the pubs recommended below.
If you're driving there then you could do worse than the Gas Club, which is very convenient for the away section. It'll cost you a quid to get in, but the beer and food are cheap. Unfortunately there's no hand-pulled beer though. There are a few other options within reasonable walking distance of the ground, all shown on the pub map. The best of them is undoubtedly the excellent Slubbers Arms, a traditional boozer with a food menu featuring various combinations of pie and peas and nothing else.
The police may try to 'persuade' those arriving by train to go to the designated away fans pub, the Boy and Barrel. There are though many much better options. For a start there are the two pubs in the station, the Head of Steam and the Kings Head, with the latter being bigger and getting slightly better reviews. A bit further afield are several outstanding pubs. The Vulcan is a cracking pub, but it's not somewhere away fans want to find themselves on a match day. The Sportsman is a much better bet. This is on the way towards the ground mind, so no doubt it gets very busy. My personal recommendation for a town centre pub is the Corner, aka Mallinsons Bewery Taphouse. This is this out of the way and slightly the wrong direction from the station for the ground, so it doesn't get too busy. They've got a massive selection of cask, keg and bottled beers from near and far. You can get a good idea what the place is like by reading the write-up in the local paper here. Arguably the best pub in Huddersfield is the Grove, which gets universally rave views (eg Tripadvisor for example). It is unfortunately a 7 or 8 minute walk from the station in more or less the opposite direction to the ground. I've included it for completeness though. One final suggestion if you travel by train is to walk (15 minutes) or jump in a cab to the aforementioned Slubbers Arms. In case anyone's wondering, there are naturally a couple of Wetherspoons outlets in the centre. The nearer of them to the station, the Cherry Tree, will almost certainly be home fans only, while the Lord Wilson gets fairly poor reviews.
All the pubs mentioned, plus one or two others, are shown on the pub map..

Pub map
Football Ground Guide