cigar like object very large 300+ft 300 ft off ground remote location crossing valley along t.c. newbrunswick canada

silver cigar shape/no sound 300 ft above vally floor crossed from one side to other /car quit /lights circler around base like those of a dirgable focusing white light on ground below/close enought to object to see movement in cabin/control room/dark moonless night /5 family members on way to fredericton for hollidays 3 adults 2 children.
car was going down long grade to middle of valley car would not start for aprox 20 min very cold out when car started drove over 30 miles to nearest gas station being a mechanic at this time i pulled in and checked with garage if anyone else had any iceing problems ans was no checked engine everything was ok. 
being military at the time i asked around to friends and other people if air balloon was in area people just laughed as this is a very remote stretch of highway.
Date in 1966 is approximate.  PD