The maxim, "It's not a matter of if you'll have an RV breakdown, it's only a matter of when," holds true for truck camper folks. And if your breakdown leaves you stranded beside the highway, unable to roll under your own power, bringing in the tow truck is a whole new experience.
We recently had a catastrophic water pump failure on a busy interstate highway. The tow

insurance folks were certainly helpful, but you don't always get to pick who they send. In this case, they told us, "Rats towing will respond." Could they spell that? "Like the small, furry animal," replied the dispatcher. Rats Towing? That's a real confidence builder! It only got better, as the responding driver who sailed in with a big rollback (flatbed) wrecker was an obvious greenhorn.
As he strolled around our camper--complete with it's three and a half feet of rear overhang, he looked more and more concerned. He finally whipped out his cell phone and got far enough away to be out of earshot. "I've towed some heavy stuff before," he declared, "but it was more compact than this." He was right to be concerned, because a rollback truck doesn't tow the disabled vehicle, rather it carries it piggy-back style. That's great for the vehicle--less stress--but getting it UP on the truck is the hang up. For a truck camper, the issues are serious.
The rollback truck turns the bed of the truck into a steep, inclined ramp. In our case, a winch cable was lashed around the truck frame, and then the whole rig is winched up onto the ramp. After that, the ramp itself is lifted by hydraulics back onto the tow truck frame. But here's the snag: With a truck camper longer than the truck bed, when the truck is winched up the ramp, geometry comes into play. With the pickup rear axle acting as a pivot point, the rear end of the truck camper can get dangerously close to the ground. An inexperienced tow operator can literally rip the hydraulic jacks off your rig if he fails to do his job correctly.
What's to be done? It can be a

lengthy but necessary process. The tow operator will need to carefully run the rear pickup wheels UP above pavement level as he winches your rig onto the wrecker ramp. In our case, on a relatively level stretch of highway several inches of wood blocking was required. At the other end where the camper was dropped off, there was a bit of a slope running down toward the rear of the tow truck--even more blocking was required. We don't believe in telling somebody how to do their job, but we were ready, willing, and had to shout out a "STOP!" call as our hydraulic jacks started to dig into the ground during the unloading process. The fuzzy (sorry, phone camera image) photo here shows the off-loading process. Several layers of planks were required to complete this tricky part.
Bottom line: When your truck camper needs a tow, don't walk away and let the tow company do the job without close supervision. Don't be afraid to speak up and ask questions. If they look like they're going to try and load your rig without adequate blocking, don't allow it. It's your rig--be sure to keep it in one piece.