Bristol City

There are buses to the ground from outside the station. Returning by bus after the game could though can take for ever. It's a little over 2 miles back to the station, so it's a long walk, or you could grab a cab. Alternatively there's the very occasional a train from Parson Street station back to Temple Meads.
 
If you're driving down then there is very limited street parking around the ground. There are though a couple of big match day car parks (see pub map below). These will of course cost you, plus it could take ages to get out after the game. Better if you arrive early enough is to park in the streets around Hotwells. You have to come past here anyway if you arrive via junction 18 of the M5, plus there are loads of decent pubs in the area (more below!).
 
Pubs
There's not much in the way of pubs immediately around the ground. Probably the closest is the Coopers Arms. I seem to remember having been in here many, many years ago, but I can't say I remember anything about it. I have though read that it's to be avoided these days. A bit further away from the ground in the same direction is the Tobacco Factory. This is an enormous place, but it doesn't get good write-ups. Your best bet really is to head for the docks area on the other side of the river. Two pubs popular with away fans here are the Nova Scotia and the Pump House. Better still though, although slightly further away from the ground, are the Merchants Arms and the Rose of Denmark.

For anyone arriving by train the obvious choice is the Reckless Engineer, which is straight over the road at the bottom of the station forecourt. This is basically an away fans pub. However, you can do an awful lot better than this as there are loads of really good pubs within a few minutes walk. Three such establishments are the Cornubia, the Kings Head, and the Seven Stars.
 
Pub map
Internet Ground Guide
The Football and Real Ale Guide