If you could do this you would not need intermediate programming as you would be definition be a novice. We don't drop the heavy day to a medium day by choice in HLM we do it out of necessity.since I have the whole week away after Friday, no need to recover for Monday; so was thinking of changing Friday to: Squat heavy, bench heavy, DL heavy
I think your expectations of not actually making progress during this time are probably in line with reality. Just try your best not to detrain. I would come in after a week off and just try to match the loads from previous week. But even that might not be possible so you might just have to titrate up every other week to establish your baseline.
Programming will prob look more like a perpetual first week novice LP.
Good luck!