You shouldn't go on a hill where deer stalking is taking place since if you interfere with any land management or commercial activities like this, you would, in fact, lose your access right because you'd be deemed to be acting irresponsibly. So you'd be in bother!
Having said that, most of the stalking takes place a bit later in the year and it seems unlikely that your plans to climb the Pap (cracking hill by the way!) will be thwarted.
If you can't get up there, the rest of Glencoe is within NTS land and there's no access issues due to stalking. The OS map shows where the NTS land is quite clearly and there's a huge area right next door to the Pap available.
Use the hillphones service or see notices posted at access points, or ask at the pub/shop for who to contact about possible stalking. If there is stalking , it's usually in the corries and open slopes and often, you'll be asked to stick to ridges in some areas to avoid disturbing grazing herds all ready to be shot at.