activities in May

I will be traveling with a family of 4. All adults. We are looking for a simple not too strenuous activity spanning 2 or 3 days that we could do in the South Lake Tahoe area. We were originally thinking of doing some kayaking with the Tahoe Adventure company but it looks like they will be booked during the time we will be there. (so sad) Does anybody know of any other reputable company? or another fun activity you'd recommend? Also, are there any evening shows that you would recommend?

Thank you!