There is parking at the college before and on the grass just after the stadium entrance. It's £6 for the college and has a direct walk through to the ground. The larger car park at the Stoop was closed last home game (hard to believe I know) and I'm not sure if it'll be open this time, so best not to assume it'll be okay.
There are usually some food stall options at the ground which aren't terrible. Probably more expensive than you're used to (I'm still surprised at the price of food and drink when I get to the DW compared to the £toop)
And there's plenty of good cultural and historical sites to visit in the area, if you can suggest them to the players rather than going on the field we'd be most obliged