I can offer a bit of local knowledge on this one.
For those travelling to Kirby Muxloe by car, I'd advise getting on the A46 and then heading round towards the M1 southbound. Don't join the M1, but take the last exit off the A46 which reads "non motorway traffic". You'll then pick up the Kirby Muxloe signs easily enough.
Kirby is a small place (smaller than Quorn for those that went there), and the ground is easy enough to find from the centre of the village. It's on Ratby Lane.
It is only a small village, and there won't be a lot of choice in terms of places to eat or drink outside of the football ground itself. There's certainly no McDonalds, KFC, etc. If you're looking for that type of thing, you're probably best off taking a slight detour onto the Beaumont Leys retail park about 4-5 miles short of Kirby - there's a McDonalds there as well as a fish and chip shop, Greggs, Subway, Costa Coffee and a few other options. There's also a range of shops there, a small market and also a Tesco petrol station. Plenty of free parking available if anyone does stop there.
Kirby Muxloe does have a castle which was built in 1480, though it's unfinished and won't be open to the public at this time of year (summer months only).