Alright let us do this then so we can finally continue!
We will run from Phandalin and then walk so we arrive in 6h. If thats not possible we will just walk. I also do not know what we will do with multiple injured or dead dwarves. We will figure it out. First priority is to safely get there.
Horse riding would be a good idea but we cant and what do we do with the horses? Thry will become targets for the goblins again. It would be great if some merchant would just take us there and drop us off. We could provide free escort service.