Hike to Marlette Lake. There is a great trail about 3.5 miles one way and about 1,200 feet of climbing near the hotel but would require a car to get there. It is dog friendly and offers great lake views along a wooded but well marked path. Find it on alltrails if you are interested!
Stick around the resort and kayak, lounge on the beach, take a dip, or fish it! You are in a world renowned alpine environment and luckily we put you smack dab in the middle of it! You don't really need to move from there. Enjoy it!
The Truckee is my favorite river to fish that runs from Tahoe to Pyramid (its the only river that does that). You can fly fish or spin cast. Its gorgeous and with any luck you'll catch a few! A day fishing license would be required if from out of state but those are pretty cheap! If you're interested a certain groom might even be willing to lend you some gear!