how is the keg stored? if in a temp controlled box/fridge, it may be easiest to refer to a kegging chart for the optimum serving pressure temp combo to set so you can just leave them as is, Articles and web info suggests that the keg should normalise at optimum condition after a week, I cant qualify that as my kegs are exposed to ambient temps.
iirc there is a kegging chart stickied over on Jims using centigrade instead of farenheight temps as most of these charts seem to have american origins, consiquently i think they suggest higher condition levels than perhaps we enjoy over here.
IF your using corny kegs, its safer to leave on gas as there is a slight risk of loosing the lid seal IF the pressure drops through total absorption, especially if in a shed and a sharp frost ocours. sankey kegs and polykegs however dont have lids so its not relevant.
Pressure conditioning in a keg is quicker and creates no additional sediment, as the kegs that can take the pressure needed to pressure condition all use spears or dip tubes to drain from the very bottom, It can mean the difference between 1/2 a dirty first pint or 2 dirty first pints..