I concur with the idea of sectioning off a smaller area first.
We had 4 weaners last year - the area we had for them was about 20m by 30m and they never got to the stage of trashing the entire lot. We started off giving them about 20m by 10m for the first 2 months, then moved the tape out to the larger area for the last 3 months.
Our fencing was a cornish hedge along one side (a cornish hedge is actually a stone wall but with loads of earth incorporated into it so lots of plants grow in it.) then electric tape around the other 3 sides. We used 2 runs of tape - 1st at about 9inches and the other at about 15inches. Also for the first couple of weeks we had a more solid fence on the outside of the electric tape so that if (when!) the weaners tested the tape they were encouraged to go backwards instead of forwards (tip from Oaklandpigs One Day Course
) Don't know if we were particularly lucky - or our GOS boys just very well behaved! - but we never had any escapes.
We did have unprotected stock fencing (ie no electric tape at its foot) at one point and the pigs thought it was a fabby back scratcher....
Enjoy!
Tish