Это вариант поможет практически оказаться на том же месте в тот же час из года в год.
Отъезд              - 10.06.10 из Москвы стандартным поездом на Петрозаводск 18-25
Возвращение     - утром 16.06.10 в Москву стандартным поездом из Петрозаводска 9-00

Информация о маршруте.
http://maps.yandex.ru/?text=Россия, республика Карелия, платформа Суойоки&sll=32.536989,62.186311&sspn=0.175747,0.061588&ll=33.522169,61.489911&spn=3.971558,1.25003&z=8&l=map,pht&rl=34.247275,61.830601~-0.12084961,0.037634891~-0.090637207,0.014263185~-0.085144043,-0.011669383~-0.14282227,0.010373005~-0.13183594,0.010369482~-0.057678223,-0.0064805131~-0.17852783,0.0012962127~-0.33576965,-0.037288122~-0.040169265,0.00051176835~-0.039534755,0.0098703741~-0.012016296,0.0056752818~-0.018539429,0.0000000~-0.029182434,-0.011189407~-0.019912720,-0.014276514~-0.052185059,-0.0074653772~-0.052871704,-0.0029217603~-0.00014031306,-0.013560029~-0.015106201,-0.017277590~-0.072784424,-0.0091007762~0.0082397461,-0.027969291~-0.026092529,-0.024087028~0.021972656,-0.016937330~0.010986328,-0.016946670~-0.012359619,-0.017608355~-0.024719238,-0.017618435~0.019226074,-0.026119923~-0.0096130371,-0.018297123~-0.0027465820,-0.041862771~0.069351196,0.0022908074~0.026092529,-0.0013090291~0.0041198730,-0.025209619~0.0068664551,-0.016708596~-0.016479492,-0.012783249~0.013732910,-0.0095089138~0.0041198730,-0.011808229~-0.027465820,-0.0078746522~-0.069351196,-0.034146607~-0.053558350,-0.022018198~-0.0096130371,-0.022362784~-0.013732910,-0.024683488~-0.030212402,-0.013831303~-0.00068664551,-0.0082358342~-0.040512085,0.00098841500~-0.066604614,-0.015159141~-0.048751831,-0.019783869~-0.010986328,-0.018641293~0.0024032593,-0.029056354~0.0034332275,-0.016521335~-0.0054931641,-0.018844964~-0.012359619,-0.010253777~0.0054931641,-0.013235639~-0.041885376,-0.017545831~-0.019912720,-0.015236414~-0.012702942,-0.0067925386~0.021286011,-0.012067211~0.029182434,-0.016413820~-0.0041198730,-0.0054731780~0.026092529,-0.010368883~0.034675598,-0.015434622~0.035362244,-0.016106542~0.015449524,-0.010797653

Прогноз погоды
http://www.gismeteo.ru/city/busy/?city=3934