Yes there are example of Krsna Conscious persons whose worship was solitary life, and the greatest example is Haridasa Thakura. Haridasa Thakura used to live only in a cave sometimes and would spend his whole time chanting the Hare Krishna Mantra. Similarly Gaura Keshore das Babaji the spiritual master of my guru maharaj would chant alone in a solitary place so as not to be bothered by anyone in his meditation on Krsna. But these great personalities are not to be imitated. If we artificially imitate, out of some negative feeling or out of desire for adoration as a saintly person, it will not be very beneficial. On the authority of Lord Caitanya and my spiritual master, I am requesting my disciples to always stay in the association of devotees and to propagate the sankirtana movement all over the world, so that others may get a chance also to become liberated from the material condition. Prahlada Maharaja prayed I am not satisfied to go back to the kingdom of God alone, but I must bring back with me all these poor fools who have no alternative ultimately than to surrender to You. This form of worship called gostananandi is more superior than the gostananandi or the holy man who lives alone in meditation of the Lord within the heart. This is the estimation of the scripture.
Letter to Yadunandana, 25 June, 1974