Removing the jointed hoses is easy and takes seconds. Anywhere where you make a break in the aircon pipes, such as removing the hvac or recirculating like you said. You will need to have the gas removed first.
One to remember is the heating side of the HVAC, I clamped off the pipes near the diesel heater and cut them, made a U shaped bypass pipe using 2 elbows and small tails of 15mm copper with olives clamped on so the jubilees had something positive to clamp onto.
OEM diesel heater doesn't just do the rear HVAC it is also used to heat the engine when started below 5 degrees, so need to keep in place and working.
Curtiain airbags are another, remove them and bypass under the passenger seat using a 2.2 Ohm resistor.
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