Does a lower profile tow better? NOT a mileage Question

My suggestion from 5 different trailers is to get the one with the floor plan that best fits your needs.....and forget about mileage. Good mileage when towing an RV just isn't going to happen.

Your plan ( Travel 3-5 times a year 100-300 miles) is just not worth even worrying about mileage.
If you set up whatever you get correctly it will tow just fine.

Good luck with you search and choice.