When we wanted the maximum space on a short bed SRW, we bought a 9' with a single slide. When we wanted more room, we went to a triple slide 11.5' model.
Our last three RV's have had slides with no problems, so reliability is not an issue for us. They are less efficient in extreme cold, but many can be fully or partially retracted with usable space inside.
If I was driving my truck on frame racking terrain, I would be looking a looking a lower profile non-slide model. I have toys to take through those conditions at faster speeds and more comfortable ride, so I don't worry about twisting my camper apart.