You can normally buy T shirts there, think you might get a branded Buff as part of the entry pack (we did years ago). There are medals for loads of categories, between the wife and I, we must have 6 or 7 No Fuss Event awards for various team categories – they’re not very hard to win 😉
The lap is quite short, so no need for food (or even a water bottle). Take a variety of clothing and lots of it as the weather can be anything from snow (last time we did it) to sunshine, so you’ll need sun cream and down jackets.
Also, there is normally a water splash, so if you’ll get wet each lap, hence several sets of dry shorts / socks are a good idea.