Apr 8, 2013 - 1:24 PM
Welcome globetrotter2528! Well, you pretty much summed up the highlights I'd recommend :-). Some further tips: the traffic musuem and glacier garden in Lucerne, boat trips over the lakes Lucerne, Thun and Brienz and a large amount of stunning viewing points in the Jungfrau region (consider First, Männlichen, Schynige Platte, Brienzer Rothorn, and so on. Most of them will have their seasonal start by end May/beginning of June).
This list may provide some more ideas, including bad weather alternatives.
Depending on your final itinerary, a
rail pass will help you save money.
Here are some guidelines to start off with.
In case you're still looking for hotels: centrally located ones, near the railway stations, are listed
here for Lucerne and
here for Interlaken.