If it's sunny there'll be a load of PPLs filling the sky, if not then there'll be loads of UNcontrolled Military Fast Jets to try to avoid etc..... without adequate radar coverage.
An orange lo-co airline has been flying in to such a place for years. Inverness.
The Harpies flew in to Prestwick for over a decade before it had controlled airspace. Then there's Teesside which was/is unattached to the Airways structure, plus Blackpool, etc, etc.
It's nothing new.
Some of you may have experience in operating into this or similar places. On the face of it it sounds as if one shouldn't even attempt to go there because of the various factors that are in the brief.
There is no such thing as a completely safe flight. Close calls happen in Controlled Airspace too. All you can do is minimise the risk by good airmanship such as actually looking out the window, obtaining a radar service as far as possible, and being aware of local knowledge and likely traffic patterns.
Seems the company brief is giving you a lot of information to make the airmanship aspects easier for you. It's an environment that pilots all over the UK face every day and handle as safely as possible.