We have a 26BH, we have it loaded up to 6300lbs and 700lbs tongue weight, your 28BH will be probably 700lbs or so heavier overall. I tow it with a 2004 F150 FX4 ext cab, 5.4L with 373 gears. The truck tows it just fine, I always run with OD turned off, I can run with OD on but on the slightest knoll it shifts out of OD and into 3rd so its easier just to turn it off and run that way.
Grey Wolfs are pretty nice campers for the price, just as good or slightly better than the Jayco Jay Flights we looked at. Good luck!!
TT-2013 Passport 3220BH
TV-2004 F150 FX4, not exactly stock...
with 2001 Kodiak K215: 2010-10, 2011-12
with 2012 Grey Wolf 26BH: 2012-19, 2013-24, 2014-11, 2015-6
with 2013 Passport: 2015-13, 2016-15 booked