Previous setup was quickly figured out and Dexter happily pulled him self over the play pan’s wall (mastiff power). He ended up spending some of the night rearranging the living room. Nothing drastic :).
However, reconstruction was needed of the playpen for the times when we have to leave.
Thus the new setup
This system worked and we were able to leave for Thanksgiving dinner and to go out for drinks after with Dexter safely having his sleep and relief space without soiling his bed/crate and staying safe at home.
I used 3 connected play pan walls and attached it with wire ties on one side and locks on the exit site. I used another panel on top and wire tied it on one side in the form of a hinge and used a velcro tie to secure the other end.