Dellzeqq used a taxi for the luggage from Pompey to the ferry check-in. And I think for the reverse.
Could you put the bag in a taxi from home to the railway station, and from the railway station in portsmouth to the ferry terminal? it seems a shame if you cannot ride your favourite bike for a whole week.
and i understand ian is planning to drop bags at the hotels (assuming there is not a ridiculous number of them) so that bit should be no problem.
As for the journey at the end to the ferry terminal, well that is about 9 kilometres. @
srw is talking about the distance from check-in to the actual boat, you could walk that.
maybe we could put bags in the van and drive the van to the ferry to drop the bags off before returning the van.
let me have a bit of a think about this.