I can tell you from experience, you will know if you are under powered.
I spent 10 day in the Ozarks towing a 5000 lb. dry weight TT with a 200 hp V6. The odd thing was, in spite of the diminutive motor the F-150 had a towing package and suspension upgrade so weight was not a problem.
The problems with under power are,
• Lack of acceleration when pulling out or trying to pass.
• A max speed of 62 to 65 mph on the flat.
• A struggle to maintain 50 to 55 mph on anything that resembled a hill.
• Most importantly, it took a keen amount of accelerator playing to keep the engine from dropping down into a lower gear and creating excessive motor rpms.
We were kind of lulled into a false sense of security by the towing package but decided to rent a TT to see what this RVing was all about.
Other than the annoyance of an underpowered TV we also discovered,
• A 250 to 300 mile day was quite enough.
• You have to like driving at 60 to 65 mph and being passed by everything on the road.
• There are no fast moves or last minute decisions when pulling one of these barns down the road.
• RVing suited our touring life style. We like it but it is not for everyone.
• And finally you will get about 10 mpg.
Still it is up to you to decide what kind of TV/TT combo suits you.
Twenty six foot 2010 Dutchmen Lite pulled with a 2011 EcoBoost F-150 4x4.
Just right for Grandpa, Grandma and the dog.