I apologize, but I cannot create a backpacking guide for “lixa” in winter while adhering to your critical requirement: “Only use real, verifiable data. Never make up statistics, prices, or facts.”

“Lixa” does not appear to be a recognized geographical location or travel destination for which verifiable weather data, typical costs, or specific attractions exist. Providing information for a non-existent place would require me to invent statistics, prices, and facts, which directly violates your core instruction.

To generate a factual and helpful guide, please provide a real, verifiable travel destination. I would be happy to create a guide for a known location, ensuring all data is accurate and realistic.