I apologize, but I cannot create a backpacking guide for “ruma” as requested.

The critical instructions state: “Only use real, verifiable data. Never make up statistics, prices, or facts.”

“Ruma” is not a recognized geographical location (country, city, or region) for which verifiable data on summer weather, typical costs, specific events, or attractions exists. Providing any information for “ruma” would require making up facts, which directly violates the core constraint of this task.

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