On a park the question is usually the clubhouse, bar or entertainment venue, not the pitches.
On a holiday or caravan park, the building that usually matters is the clubhouse, bar or entertainment complex. If it is reasonable to expect 200 or more people in it at once during the season, it is likely to be standard tier, or enhanced at 800+. Check your scope against the SIA's guidance and scope tool when it launches.
The four procedures are explained on the standard tier page, tiers on which tier am I in, and there is a checklist and a worked example.
Before you pay anyone: the Home Office says premises do not need to buy consultancy to meet the standard tier, and its guidance, the SIA’s guidance and the ProtectUK training are free. Neither the Home Office nor the SIA endorses any provider, including us. The legal responsibility stays with the person responsible for the premises; we help with the work, we do not take the duty off you.
Evacuation: from the entertainment hall to a point away from the park entrance.
Invacuation: keeping guests inside the complex while a threat is elsewhere on the park.
Lockdown: the clubhouse doors and the bar shutters.
Communication: the entertainments PA and a message to caravans and lodges.
Send the venue type, the most people you would expect in at once, and how many sites you run. We will tell you which tier you look to be in and whether the free route is enough before quoting anything.
Scope is about qualifying premises, which are buildings (or buildings with land) in a listed use. On most parks the relevant building is the clubhouse or entertainment venue. Check your own layout against the SIA's guidance.