According to this page
, you can tow up to 2,000 pounds "if properly equipped" which may require upgrades such as a transmission cooler. You might consult your owner's manual for other requirements for towing.
That limit is of course the maximum- your choices in that case are pretty restricted, especially since you want a toilet and shower, too. Those usually entail holding tanks etc., and there are few if any fiberglass trailers so equipped that will come in at or under 2,000 pounds when loaded.
Hopefully if folks have info to the contrary they'll weigh in with suggestions.