We had a HW 27C Flagstaff and were told on our PDI that the limit on the bunk ends was 500 lbs WITH the support bars, and to make sure the supports were always in place before putting any weight on the bunks.
Never did see anything 'official' in the owner's manual, etc on the weight limit, however my husband, myself and at least one kid from time to time would sleep in the King end bunk and it held up just fine.
2012 Flagstaff V-lite 30 WTBS
2011 Ford Expedition
4 kids and a hubby & never enough time to camp!
2011: 17 nights 2012: 26 nights 2013: 46 2014: 20 2015: 16