I've done like 18 of the 21 years HHN has been in existence,the express pass hasn't always been around but since it has been I've yet to purchase it and have seen every haunted house,scare zone and show in all the years I've been.There are however some things you have to know,first of all if you're going on a weekend near the end of the month you're probably going to have to get the express pass or you'll probably only see half the houses.If you want to avoid buying it go on a non-peak night earlier in the month and if you have park passes during the day stay in the Stay and Scream area where they'll let you out earlier than the people in the front gate and you'll be able to do 2-3 houses with little to no wait.If you do 4 or 5 houses as fast as you can it might only be 8-9pm and you can try and see the Bill and Ted show around that time,then you can hit the rest of the houses or whatever the second show might be and hopefully the crowds can ease off by 11-midnight to get a couple of your favorite houses in again with smaller waits.They've actually extended the hours on some non-peak night until 1am as they used to be midnight a couple of years ago,that extra hour can be helpful as the lines should be smaller by then.One thing there's no way I'd do during HHN are the rides as it seems silly to have an AP and take time from HHN to ride the rides,if you're not a regular visitor I can understand trying to get a ride or two in.