Bern Accommodation

Hoi, I plan to visit Switzerland with my wife in the next days. I have read some news about the flooded Brienz area were we wanted to go. Now we are thinking to stay in Bern and to have 2-3 days of hiking in Grindelwald, Lautenbrunnen and the near of this areas. On google maps I have checked that are 75 km between Bern-Grindelwald, and in 1,5 hours we cand be there and it’s not that much in my oppinion. Please give us some advices how to choose the best option.

Many thanks🗻