Toy haulers do offer some compelling advantages and they can't be beat in terms of flexibility. You can use the garage any way you want, and you typically get an on-board generator and really big tanks for camping off the grid in comfort. We're seriously considering going to one when we upgrade in a few years primarily because they are so much more flexible than a standard fifth wheel trailer, not only in terms of hauling toys but also with how you use the living space. And the aforementioned generator and big tanks are really appealing given the way we like to camp dispersed whenever possible.
The tricky thing with toy haulers is keeping the sizes down to a reasonable length because your options are limited at 35'. I also have a mental aversion to going much longer than that.
