In May 2023 this road was driveable with 4x4 HC (steep and rocky) to at least what is called Interlaken Peak on peakbagger app. Sounds like there may have been a gate added on Florence Lake FSR by Pomerleau who are doing some construction in the area, so until they are finished and remove the gate this road will be inaccessible (by car/truck at least). There is also a ~2km switchbacking spur road down to a BC Hydro building close to "Bluff Point" which is gated at the top, this could be used a kayak launch for Judge Howay access (but you'd be carrying/wheeling kayak that 2km).