If you have to wait until Monday, at all costs, disable the HVAC operation! At least the A/C clutch.(It shouldn't operate anyway.) Plug the hole (whatever you use, don't let part of it inside the system, even a fragment!) If you pump it down with the hole (duh) you'll let the outside contaminants in. Get some R-134a hoses/guage and a can of R-134 at a Pep-Boys or equiv. and temporary "pressurize" the system enough to push out any air that migrated into it. (engine off/ A/C off in this case) Can rt side up & slow in this case, until after the hiss for a short while, then plug it if you can. DON'T BREATHE IT!! Otherwise, prepare for a receiver/dryer as well as your condenser, at least. Simplly put the Rec/dr. sucks moisture. You'll have to have a good vac on it for a while to boil any out.
Any other takes on this?