That's what I was going to suggest. We did the after 3pm entry and got a lot done that first night while everyone else was going off to shows outside the park. Then used the same tickets for the next day. Great deal!
If you are renting a cabin, the agency may offer tickets for sale. These are usually 2 days for the price of 1. We went last year and rented a cabin through Eden Crest. But we only visited the park for one day.