Post w Grindelwald, Canton of Bern, Switzerland

Hi, I'm a New Zealand Ultra-Trail Runner. I'm traveling to Grindelwald to compete in the Eiger Ultra-Trail (101km), Saturday 16 July. I have two night accommodation provided by the event organisers; Fri 15 and Sat 16 July. However, I'd like to arrive in Grindelwald, 5-6 days prior to the event to train in the mountains/on some of the course. But I need somewhere to stay - perhaps you can help out? I am travelling on my own (leaving my husband and 4 year old son back home in New Zealand). I'm happy to answer any questions.