JACKAROO- END OF THE LINE

I have a 1999 V6 3.5 L Jack - I tow a 17 ft caravan which tows well. Four wheel driving I do is 2-3 day trips, not long desert jaunts at all. I've put in gas shocks , stiffer taller springs on the rear and wound up the torsion bars on the front. Problems I 've had include squashing the transfer case bash plate, and having to replace the cargo section plastics - either I'm a rough driver or the plastic is too weak. Would you like to comment - and also with Jackaroo going out of production I am seriously considering either keeping what I've got or buying another fourby - what would I go for ?