SIKKIM WHERE THERE'S HOPE GUESTS IN TOP HATS AND CUTAWAYS MINGLED WITH OTHERS IN FUR-FLAPPED CAPS AND KNEE-LENGTH YAKSKIN BOOTS LAST WEEK OUTSIDE THE TINY BUDDHIST CHAPEL IN SIKKIM'S DOLLHOUSE HIMALAYAN CAPITAL OF GANGTOK . WEDDING PARCELS FROM TIFFANY'S WERE PILED SIDE BY SIDE WITH BUNDLED GIFTS OF RANKSMELLING TIGER AND LEOPARD SKINS . OVER 28,146-FT . MOUNT KANCHENJUNGA, THE WORLD'S THIRD HIGHEST MOUNTAIN AND SIKKIM'S " PROTECTING DEITY, " HUNG A BLUE HAZE . IT WAS AN " AUSPICIOUS SIGN, " SAID GANGTOK ASTROLOGERS, FOR THE WEDDING OF A QUIET, BLUE-EYED NEW YORK GIRL, HOPE COOKE, 22, AND GYALSAY RIMPOCHE MAHARAJKUMAR PALDEN THONDUP NAMGYAL, 39, CROWN PRINCE OF THE INDIAN PROTECTORATE OF SIKKIM, A TINY TERRITORY THE SIZE OF DELAWARE, WHICH HAS 3,000 VARIETIES OF RHODODENDRONS, AND WHERE, ACCORDING TO LOCAL LEGEND, THE DEVILS ALWAYS TRAVEL UPHIL . THE AMERICAN TOUCH . THE WARD OF FORMER U.S . AMBASSADOR TO IRAN SELDEN CHAPIN AND A GRADUATE IN ORIENTAL STUDIES FROM SARAH LAWRENCE, HOPE MET HER WIDOWED FUTURE HUSBAND FOUR YEARS AGO WHILE SHE WAS VACATIONING AT THE INDIAN RESORT OF DARJEELING . BUT WHEN THE COUPLE ANNOUNCED PLANS TO MARRY LAST YEAR, SIKKIMESE SOOTHSAYERS FORCED THE POSTPONEMENT OF THE WEDDING BECAUSE OF THEIR FORECAST THAT 1962 WAS " A BLACK YEAR " FOR THE MARRIAGE . THUS HOPE HAD TO WAIT UNTIL LAST WEEK TO BECOME THE FIRST AMERICAN GIRL TO WED ROYALTY SINCE THE DAUGHTER OF A FORMER PHILADELPHIA BRICKLAYER MARRIED MONACO'S PRINCE RAINIER IN 1956 . HOPE'S WEDDING DRESS WAS A WRAPAROUND, FROST-WHITE BROCADE SILK MOKEY, HELD IN AT THE WAIST BY A GOLD BELT, FROM WHICH HUNG A SMALL DAGGER . TO WARD OFF EVIL SPIRITS, HOPE PRESSED HER HAND INTO A PIECE OF DOUGH . A PAIR OF HOLY MEN CONDUCTED HER TO THE CHAPEL, WHERE SHE WAS GREETED BY A FANFARE OF TRUMPETING, 10FT.-LONG HIMALAYAN HORNS, BRAYING CONCH SHELLS, AND BOOMING BASS DRUMS . OUTSIDE THE CHAPEL DOOR WAS THE ONLY DISTINCTIVELY AMERICAN TOUCH IN THE $60,000 BUDDHIST RITE A MAT ON WHICH WAS WRITTEN IN ENGLISH, " GOOD LUCK . " BILLIONS OF DEITIES . DURING THE 50MINUTE BUDDHIST CEREMONY, HOPE SAT ON A THRONE SLIGHTLY LOWER THAN THAT OF THE CROWN PRINCE, WHO IN TURN WAS SEATED LOWER THAN HIS FATHER, THE 69-YEAR-OLD MAHARAJAH OF SIKKIM . AFTER DRINKING TEA LACED WITH YAK BUTTER, A RED-ROBED BUDDHIST LAMA IN A FLAME-SHAPED HAT INVOKED THE BLESSINGS OF THE SNOW LIONS AND BILLIONS OF OTHER SIKKIMESE DEITIES . NO WEDDING VOWS WERE SPOKEN ; THE COUPLE MERELY EXCHANGED 12-FT.-LONG WHITE SILK SCARVES, WHICH WERE HUNG AROUND EACH OTHER'S NECK TO SEAL THEIR MARRIAGE CONTRACT . THE END OF THE CEREMONY SET OFF A FOURDAY CELEBRATION IN GANGTOK, WHOSE NORMAL POPULATION OF 12,000 SWELLED TO 15,000 FOR THE EVENT . MOUNTAIN TRIBESMEN IN BLUE PAJAMALIKE CLOTHES DANCED IN THE STREETS . MIXING HAPPILY WITH THE CELEBRATORS, HOPE SETTLED INTO HER NEW ROLE WITH APLOMB . WHEN A PIGTAILED SIKKIMESE GIRL ASKED FOR HER AUTOGRAPH, THE NEW CROWN PRINCESS SIGNED WITHOUT A MOMENT'S HESITATION : " HOPE NAMGYAL . HOPE IS THE DAUGHTER OF MR . AND MRS . JOHN J . COOKE . WHEN HER PARENTS WERE DIVORCED, CUSTODY OF HOPE WAS GIVEN TO HER MOTHER . WHEN HER MOTHER DIED, SHE BECAME THE WARD OF HER MATERNAL GRANDPARENTS, MR . AND MRS . WINCHESTER NOYES . WHEN THEY DIED, SHE BECAME THE WARD OF HER UNCLE, AMBASSADOR CHAPIN .