There is a long fire road off the start area for parking, it does get busy and crowded but there is room. Security has never been an issue - you can go back to your car/van at the end of each lap to refuel.
That is a nice photo of the Castle Hotel, although the new owner has tarted up the front "patio" area as an outside drinking area.
We don't want to see your fuel cans, they can be metal or plastic, but it makes sense to put your fuel in proper fuel containers.
No one will nick your petrol, but if your really paranoid you can lock it in your car as they're probably out to get YOU
I personally wouldn't lower tyre pressures much from road pressures, particularly if it stays dry. The great bulk of the course is stony gravel tracks and there are only short sections that are muddy. If it rains you might lower them a little more but not as low as normal trail riding pressures.
There are no really deep or long water crossings, most are little more than large puddles.
If you haven't been to this area before I'd really recommend taking a camera around with you - and stopping to take pictures - apart from the Special Stages there are no real time pressures, you will have time to enjoy the views, which are spectacular around most of the course.
It takes so long to put these events together that we've already started planning next years event - hopefully we'll be able to actually start at the Rugby Club next year (as we did a few years ago) and use a few other forest blocks to get up to Llyn Brianne. We hope to be able to use the old rally tyre testing hill climb in Esgair Dafydd as a special stage again as well as Cwm Henog and Glyn Saer forest blocks - fingers crossed.