Yer toy hauler is a travel trailer or fifth wheel with a garage door that swings down in the back for loading wheeled vehicles, these are often very large and many have a generator.
Hybrids as mdamerell stated are part hardsided and part fabric sided, think of them as an expandable trailer.
Fifth wheels are generally considered roomy\larger and some models approach extreme luxury for extended stays, fifth wheels can be tall in height (ours is 12 feet 4 inches from the ground to the highest point on the roof).
Travel trailers are very popular and come in all types of flavors, such as lightweight, large and roomy, they often have 2 entry doors for convenience.
The TT won't have near the height of a fifth wheel.
TT's are nice because they in most cases are low to the ground which makes it easier for entry\exit.
This is my take, hope it helps you a bit.
