Moving tube equipment

Travel with them in the amp. My experience is they should be re-biased when you get to the new location. Over time tubes settle in an expansion-contraction pattern when you switch them on and off and rattling them during the move disturbs that slightly. Some lint inside the tube structure might dislodge and cause the tube to operate with slightly different bias settings. For guitar amps the tubes have settled into their life with the angry musician and their partner and don't need as much attention.

Russian fighter jets didn't work well without their tubes installed while on the move.

millercarbon is absolutely correct...

@wolf_garcia you forgot the inevitable beer spilled on the amp as well... they aren’t that fragile...

However, Miller is right about cleaning all of your connections. That can make a significant difference if it’s never been done. All metal surfaces will eventually corrode to some degree, which can really make a difference in SQ...