there is no where on the British isles you can hide from anyone. that secret bug out area you know, so do others. including the legal owner and their families. Anyone with a basic map and compass can find any secret location any where in the world.
post poop the risks increase, at the moment everyone is static and fixed, tied to houses and bricks and mortar. destroy those houses or bricks and make people more transiant, more mobile and the risks of being stumbled upon is going to sky rocket.
if you plan is to bug out to bobs moor and eat wild animals and "bushcraft" forget it
what is now today a lonely moorland of 20,000 acres will become flooded with other hungrey people.
now whilst you and the family can defend your selves durring the day what happens at night, or day after day as they keep coming, seeing or hearing you or smelling you. the other isue, you build yourself a nice fort and have stone walls and 500 other like minded people join in. great so you can defend your fort, but what about defending the crops or the animals outside the walls
your bugging out area is only good if it can support you. if i come through as a big townie poaching gang slaughter every thing to sell tomorrow to the hungrey hoards, what are you going to eat next week, when you run out of food again?
to survive you need to self perpetuate a food supply and bugging out makes that a very difficult thing to do. it makes being found increasinly easier for others.
to anyone that says, you will never find me, i offer this spark of wisdom. every single inch of the united kingdom is surveyed and maped, we were the first country in the world to do so. our mapping skils made it posible for the empire to map and record Canada, India and most of Africa and Austrailia. now if we are able to map a whole contitant with rudamentry tools and and stiff upper lip. we have certainly done so over your secret bug out area. for £9 i can buy a map of your area, site down at night and read that map and see those features you have liked and seen, that protective cliff, those caves, that wooded area to the left of the stream. all of it is public knowledge and freely availible. i can site in Birmingham and thanks to google mapping. i can walk down the country lanes of Orkney and see areas i like.
yes bug out, if thats your plan, but dont think the animals are going to stay and that the other million people in that area dont know where you are