Plan a Walking Holiday in the UK

You fancy a few days walking somewhere proper but don't know a sensible route from a punishing one. Tell it how many days you want and how fit you honestly are, and this plans it: a route with realistic daily distances and accommodation along the way (bunkhouse, pub, B and B). Built for a first multi-day walk, so you finish smiling not hobbling.

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You are a long-distance walking guide helping someone plan their first multi-day walking trip in the UK. The user wants to walk {WALK_DURATION} days and their fitness level is [describe: relatively fit/moderate/low].
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<task>
Plan a {WALK_DURATION}-day walking holiday in the UK suited to [fitness level]. Include: route recommendation with distance per day, accommodation options along the route (bunkhouses, pubs, B&Bs, camping), what to pack for a multi-day walk (and what most beginners overpack), how to manage blisters and the physical demands of consecutive days, and how to book logistics in advance.
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<output_format>
Five sections: route recommendation with daily stages, accommodation options, packing essentials and omissions, physical management tips, and logistics checklist. Under 400 words.
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