To revert to the original poster.
"some cumulus below 2000 ft in a class G airspace"
well what does this mean? FEW, SCT or BKN. Base of cloud? And destination forecast? MET, TAF?
Seems to me a base of 1,000 ft and FEW or SCT is acceptable. BKN has the risk of becoming OVC. Of course near Cu can be bumpy.
Return trip? Cu can continue building as the afternoon continues . . .
Probably best to be high in smooth air if you can.
flyme.