Hi, In Sept. my husband and I are going to Interlaken and Lucerne for 9 days. We have no idea how to split up our time. We really want to stay in Interlaken the longest because of all the day trips we can take. So should we set aside just 2 nights in Lucerne before we leave out of Zurich? Also from Interlaken can Gimmerwald be done as a side trip with minimal hiking involved?