They are inventive little ones.
We have our adult corn in a 55 gallon so I hear ya...We want him to have plenty of room, and you're right, it seems prviding extra hides lets him explore when he wants and duck in when he needs to.
I think by nature corns are docile but still maintain their need for seclusion as self defense etc., genetically encoded and all that. Our 3 year old corn will come out for our son about 75% of the time, but it requires a lot of patience on our sons part. Snakes are not dogs, they will not run to greet you after school/work. :crazy02: Which is part of their charm, for us anyway.
He will almost always hide if we walk into the room and catch him by surprise. But if we are already in the room he may come out and explore. As he has gotten older he has become more tolerant...but we are still giants in their eyes :bang:
Ours used to somehow get a grip on the upper edge within the tank and try to cruise, then smack!, he'd belly flop crash to the ground. Adding the PVC playland seems to have ended that behavior, we were concerend he would be injured in one of the falls.
Anyway, sounds like you have a nice set up.
1)Be sure to check your temps. If he is always trying to escape under the heat light he may just need an elevated basking spot on which to warm up a bit...
2)Ours also tries to "escape" when he is hungry...he usually would eat every 10 days but occasionally he needs a meal at the 7 day mark.
3)Now that our male is "an adult" he also seemed to be on a mission when "the season" started...
Have fun!