You have more serious problems with your tall beams
than I do with a low LongWire.
However, I have little Adventures:
I have had ICE , hanging about 2 inches long , all along my 225 ft LongWire.
Ice makes it sag more, and I use a AntTuner so I make minor adjustments.
Worst thing was the Lightning EMP that was captured and burned out my Antenna Tuner circuit.
Had to drag out my QRP tuner.
My wife said she saw birds roosting on the Wire, but I don't know.
Never affected tuning.
Glen Ellis, KK4LPG.