It appears there might be a typo in the location “ukmerge,” as it does not correspond to a real, verifiable geographical location for which I can provide accurate, real-world data on weather, costs, or attractions.

As a travel expert, my primary directive is to use only real, verifiable data and never make up statistics, prices, or facts. Since “ukmerge” is not a known location, I cannot fulfill the request for a guide specific to it while adhering to these critical constraints.

If you can provide a correct, verifiable place name (e.g., a specific town, region, or national park in the UK), I would be happy to create a detailed backpacking guide for that location in winter, complete with realistic estimates and factual information.