You can try avoiding the homestead for a while, to see if progressing through the main plot increases your base reputation enough the imps stop being hostile.

Try separating your party, and seeing if one of more characters can pass by the imps peacefully as long as the one that moved the crate (presumably clipping one of them and doing damage) is not with them (leave them in the observatory portal, since that is handy when teleporting into the homestead).