ACR FLC MAY HAVE INADVERTENTLY TAKEN OFF BELOW RVR MINIMUMS.

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I WAS A COPLT ON A SCHEDULED ACR OP. IT WAS THE FIRST TRIP WITH THIS CAPT. ENRTE WE WERE REASSIGNED TO A DIFFERENT ROTATION THAT INCLUDED AN OVERNIGHT STOP INTO A SMALL; MOUNTAINOUS ARPT. CAPT AND CREW WAS LATE ARRIVING AT ACFT THE NEXT MORNING. THE CTL TWR WAS NOT OPERATING UNTIL AFTER OUR SCHEDULED TKOF COMPANY OPERATING INSTRUCTIONS DID NOT INCLUDE INFO ON HOW TO OBTAIN AN IFR CLRNC OR WX INFO FOR THE ARPT. CLRNC WAS FINALLY OBTAINED FROM ZSE. DURING TAXI-OUT; CAPT LOADED AND EXECUTED THE WRONG TRANSITION IN THE FMC. IT TOOK SOME ADDITIONAL TIME TO REMOVE; RELOAD; AND VERIFY THE CORRECT DEP ROUTING. A FEW MORE MINS WERE SPENT REVIEWING THE IFR DEP PROC AND THE MSA ON DEP. ZSE ADVISED THAT CLRNC WOULD VOID IF NOT OFF IN 5 MINS (?). A SMALL COMMUTER ACFT HAD TAXIED OUT IN FRONT OF US AND TOOK OFF. WE GOT THE RELEASE FROM ZSE AND WE TOOK OFF. SHORTLY AFTER TKOF; I HEARD ZSE GIVE ANOTHER ACFT A 1400 FT RVR READING AT MEDFORD (WE NEEDED 1600 FT RVR FOR TKOF MINIMUMS). IN MY RUSH TO COMPLETE FMC REPROGRAMMING; REVIEW THE DEP; AND DO MY OTHER COPLT DUTIES; I REALIZED I HAD FAILED TO CHK THE TKOF MINIMUMS FOR THE ARPT. LEADING ME INTO THIS TRAP WAS NO OPERATING TWR (NORMALLY DON'T GET RVR READINGS FROM CTR); THE TKOF OF AN ACFT IN FRONT OF US; AND LACK OF GOOD COCKPIT RESOURCE MGMNT. TO PREVENT FUTURE OCCURRENCES; I HAVE SUGGESTED TO THE COMPANY THAT THE OPERATING INSTRUCTIONS PAGE FOR THIS ARPT INCLUDE INFO ON HOW TO OBTAIN A CLRNC WITH TWR NOT OPERATING AND INFO THAT ZSE HAS CAPABILITY TO ISSUE RVR READINGS FOR THIS ARPT. IN THE FUTURE; I WILL ALSO ADVOCATE FOR AN EARLIER HOTEL DEP WHEN DEPARTING FROM UNFAMILIAR ARPTS.