It sounds doable, but be prepared to worry about range, and practice mental math all the way.. ALL new owners do so. As you get more experience, you will find it more comfortable.
I have a friend who drove his Leaf from Atlanta to Delaware.. He said he found dealerships were almost the perfect distance apart. (760 miles)
Every week, I drive 42 miles, on flat ground, at 55-57 most of the miles on what compares to a freeway & 6 miles in a city. . I use 50-60% of the total battery capacity on that trip. I charge to at least 10 bars before heading back. I can make it home at 65 if I am fully charged, but that leaves little margin. I always plan my trips not to get into the last 2 bars, but many people do go that far.
Download, if you haven't, Plugshare, Chargepoint, and whatever chargers are common in you area. Plugshare is crowdsourced, and private folks may be on it, as well as L1 wall plugs.
Try and keep the speed in the interstate to 55.. I get about 3.8 miles /KWH in cold weather on flat ground at 55 with no headwind.
Also, I find I get better mileage with cruise control on.
Start each segment charged to 90%-100 %, it will make you feel better.
The heater may take 5 - 8 miles off range.
We don't have hills here, so I can't comment.. I have an app, Nissan Leaf Range Estimator, which does a good estimate, based on speed, elevation change (google map based) and temperature. My version is for the 24Kwh battery.
Have fun, and enjoy the quiet of the car.. THat is the best thing at 55.