Engelberg, Switzerland

I'm impressed with Engelberg as I count three different ski lifts operating in the summer to whisk hikers, day walkers and tourists up the mountains encircling the valley. The Rotair, a revolving gondola, seems to be THE lift to take as I count over 35 tour buses in the parking lot. The pedestrian-only main shopping street runs for several blocks and is geared toward the day tripper tourist. Wherever one walks in the valley you're rewarded with great views.

Is this place hopping or is it dead in the summer
Engelberg is booming in the summer.

Is there a lake and/or golf course in town?
There's an 18 hole golf course and a lake, which had people walking, jogging and cycling around it plus, several were fishing.

Arriving by car the only option?
The train will deposit you right in the middle of town.

Does the place feel claustrophobic?
The valley is around six miles long and maybe a half-mile wide, making it quite comfortable.

Lots of choices for acccomodations (hotels/ chalets) and do I have recommendations?
Plenty of hotels to choose from. I stayed at the four star Ramada Hotel Regina Titlis in the town center and give it the two thumbs-up. I was scheduled to stay at the 100 year-old Hotel Schweizerhof, a completely non-smoking property. However, the hotel was full and I was given a room across the street at their annex property, the Hotel Crystal. While the room at the Crystal was immaculate, it was way too small and I ended up leaving.

Could I spend a whole summer here or would I get bored?
I could comfortably spend a month in Engelberg.