This is the OSRIC sleep spell:
This spell affects a circular area with a 15 ft radius. A number of
creatures within this radius (determined by their HD) fall into a
deep magical slumber with no saving throw allowed. Magically
sleeping creatures may be killed or tied up at a rate of one
per round by a single person, or can be attacked at twice the
normal rate with an automatic hit for maximum damage, if the
attacker chooses not to kill or bind them. A sleeping creature
requires a full round to waken and must be shaken or slapped
to bring it to consciousness; mere noise, however loud, will
not disturb the enchanted slumber of a sleep spell’s victim.
The number of enemies affected by the spell is a function of
their hit dice. If there are creatures of different hit dice in the
area, the weaker ones will be affected fi rst. Creatures with hit
dice over 4+4 are not affected by the spell.
hit dice of Victim number affected
1 or less 4d4
1+ to 2 2d4
2+ to 3 1d4
3+ to 4 1d2
Duration is 5 rounds/level of caster.
Range is 30ft + 10ft/level of caster.
We shouldn't have any problems with a 15 foot radius. Center it on the person in the middle of the watch party and we'll be more than 15 feet away from them.
Dragon foot. Bamboo pole. Little mouse. Tiny boy.