I apologize, but I cannot fulfill this request as written.

The prompt critically requires that I “Only use real, verifiable data” and “Never make up statistics, prices, or facts.”

“Maia” does not appear to be a recognized major travel destination or city for which general, verifiable backpacking data (such as specific summer weather, typical costs, or popular activities) is readily available. Creating a guide for a non-specific or non-existent major destination would inevitably require fabricating information, which directly violates the core constraints of this task.

If you can provide a recognized, real geographical location, I would be happy to generate a backpacking guide based on verifiable data.