I would be a little concerned about filling the tank completely full. If you were on the road and knew that you were going to be burning fuel quickly it should be OK but, if for some reason you had to stop and the fuel was able to heat up, it might get messy. It might also be illegal but not sure how you would ever get caught.
US DOT Regulation 393.67 Subpart E.
12) Overfill restriction. A liquid fuel tank manufactured on or after January 1, 1973, must be designed and constructed so that—
(i) The tank cannot be filled, in a normal filling operation, with a quantity of fuel that exceeds 95 percent of the tank's liquid capacity; and
(ii) When the tank is filled, normal expansion of the fuel will not cause fuel spillage.
THERMAL EXPANSION Like all liquids, diesel fuel expands slightly in volume as its temperature increases. The coefficient of thermal expansion measures the rate of the expansion. A typical value of the coefficient of thermal expansion for diesel fuel is 0.00083 per degree Celsius (0.00046 per degree Fahrenheit). Using this value, 1.000 gallon of diesel fuel at - 7 °C (2 0°F) will expand to 1.037 gallons at 3 8°C (100°F). 50 gallons could expand to almost 52 gallons.
2014 Seneca 37FS