Where, oh where?

So, I am still looking at different and exciting places to go for our fabulous family reunion. Here are a couple more ideas: Lake Tahoe (Nevada/California), Las Vegas, NV, or we could have another CA beach vacation. I am just trying to be economical. I think a beach vacation might be too expensive, while Vegas would permit plenty to do, I'm not sure how easy it would be to find a central gathering place. Lake Tahoe might be perfect, but is it too far to travel for some?