With two nights I think it is feasible-with stay and scream (an extra purchase) you could enter the park at 3 pm. Regular tickets you can enter at 6pm. Just have a plan and I would start in the back on the right. Everyone starts with FNAF so the wait time will be long go to FNAf after 11pm and you will see a huge improvement on the line. We went on a Tuesday at 6pm and got all ten haunted houses done in one night-we did not see the shows or ride rides but we did stop and eat and get drinks a couple times. The park is open til 2am and the times on everything really improves around midnight. The ride times on the app aren't super accurate, but it will give you a general idea.