hmm, this is interesting, do you stay put or await rescue.
the oxygen and radio would be 1 and 2 because in either situation they're essential.
star chart would be third as either giving rescuers a position or having to navigate (assuming you're in an intact space suit) for a walk.
now we need to decide if we're staying or walking, if staying then it'd be heater water food parachute (to make a marker), if walking it'd be water rope flares raft (for sun shield)
the pistols, compass and milk are pretty much useless in either situation (well, maybe the milk could be an extra food sustinance for a waiting scenario), whilst a gun and a compass could be useful in an earth based scenario a compass wont work on the moon and a traditional 3-shot emergency signal doesn't help in a vacumn where they can't hear it (btw guns do actually work in space)
the only one that doesn't fit is the first aid kit, as depending if anyone was injured in the landing it'll either be vital (to fix them up) or useless (as if everyone's fine you wont injure yourself staying put and any injuries on a walk can't be fixed through a space suit)
if we assume everyone's fine and we decide to walk then i'd take the oxygen and the water, tie everyone together, and use the star chart to navigate whilst putting out calls on the radio just in case someone hears, use the raft to tow the oxygen bottles and shelter under if the suit's sun protection isn't up to scratch.
if we assume injuries and we decide to stay then it's a case of patch folk up with first aid, call for help on the radios using the map to find our position, and drag out the parachute silk to make a visible market, then it's just a waiting game until the oxygen/water/food runs out (almost certainly the oxygen)
