In reply to coolbert:
I don't expect you will get many recommendation here for soloing around Cham. In the grades you are suggesting (I assume you mean scottish winter grade 3) you could be looking at something like the north face of the Courtes, but April may still require getting about on skis, and I wouldn't suggest going alone up the glacier.
If you gave some suggestions of what you have already soloed in cham and the type of routes it would help. General around april you are looking at mixed routes.
As for meeting people I wouldn't have a clue these days. The old school way was to hang out at the mountain information office, and leave your details in a book there.