The most important thing for range is aerodynamics. A tall camper with a mostly flat front sits in the wind and really hurts your range, especially at higher speeds. My R1T's "usable" range towing our Grand Design Imagine AIM 18BH is 100 miles +-10.
Based on what I have seen others post, a good rule of thumb is 50% less range when towing. Of course the faster you go the worse it will be. And smaller more aerodynamic trailers have less impact. But use 50% as your starting point
It should have decent range (when not towing)... in a recent thread about the R2 battery, RJ confirmed the battery will have 768 cells each with about 119wH of energy. That will give you a pack rating of about 91kWh before they take a few kWh out for top and bottom buffer. So if we get 88kWh usable and the R2 efficiency is around 3.5mi/kWh that gives the R2 an estimated range of 308 miles. That's not too shabby for a mid-size SUV.
Not much you can do about that, it's a smaller vehicle with less room for batteries underneath. By the look of that battery pack RJ posted photos of... it was filled with cells from side to side and end to end already.
Actually they canceled the modular rack thing that you saw in those pics and have opted for a standard hitch. Trying to cut costs.
