I have a 2002 Safari Trek 2830, in fact my wife and I are in it right now on day 5 of a 10 day trip. There are a few coaches out there that have bed in the ceiling, but the only other one that has a ceiling bed and no bedroom is the 2003-2004 Holiday Rambler Traveler, at the time Monaco owned both Safari and Holiday Rambler, they introduced the Traveler is a cheaper version of Trek, lacking the full body paint, real wood cabinet work, etc. of the standard Trek. They had tried much the same thing a year earlier with the Trek Sport, a 2002 only offering.
The Trek's are not for everyone, and yes there is a private space issues being just one big room, other than the bathroom, but show me any other sub 30 foot coach with nearly 7 feet of kitchen countertop space and a bathroom where you can't touch opposing walls at the same time.
p.s. there are a few Safari Trek designs that do give the potential of separate space, though they do make other compromises, for example the 2004-2005? Trek 30PBS with the forward bathroom just behind the drivers seat, making the cockpit area isolated from the living space, at the cost of having a small bathroom. Or the 31SBD which puts the bathroom between the kitchen and the living/bed room in the back, which makes it a bit more like the typical bedroom layout, though with a bedroom/living room convertible room.