Game Fair at Hatfield House

Have been given a couple of free corporate tickets to the above.  Even though I have to spend some of the day pretending to be grown up in front of clients / co-consultants, I will have a few hours doing what I want. I was thinking about taking my gun along and having a go at the sporting and a few of the other things on offer.

Anyone been in previous years and was it worth shooting? I've spotted that they are offering gun storage for the day. I presume you can drop it in and retrieve it multiple times if necessary?