Towing a Micro lite 21 FBRS with a Ford Ranger

 No problem in Flatlandistan for sure. I’d get a little cautious if it’s real windy though. 
Power for hitting the hills depends on which engine you have, although both (3 incl the raptor motor) have way more power than anything rated to tow 5-7k from a few decades ago. Great by those standards. “Ok” by todays standards. 
You’ll need to shore up the suspension or use a wdh though, regardless.