The site was only lightly burnt, so I had hoped they would survive. There was no sign last time I checked, 3 weeks ago, when leaves had already been up for 2 weeks in the eastern colony. There is nothing happening in the colony you found last year, which was similarly lightly burnt (assuming I was looking in the right place).
To be honest, I can't even find my colony now... I remember there were plants in the area, and the grass was green. There was fallen timber... I might not be able to find it until the regrowth has occurred and it resembles what it did when I found it.