Plug in truck bed or use plug in bumper for 5th wheel

Just curious to see how many of you add a plug in the bed of your truck to plug in the 5th wheel or do you use the one in the bumper? On my old truck they put a plug in the bed of the truck to plug in the trailer and when I lost a rear tire, so went the whole plug and wire harness. It tore it all out. I replaced the cable for about a $100 but may use the plug in the bumper on the new truck. Just looking at both ways to go so if you have a recommendation, please let me know.
Thanks,
Curly