Chris I'd have liked to do the excursion but am (also?) booked up for the St Ayles trip at noon. I'm happy to help with our boats, and then go on the CRAB trip.
(A) I thought you might like to look at the advisory note I posted to Victoria, as it will also be pertinent for your trip.
In short Emsworth will be very crowded on the water on Saturday. See the notice of race below for a hint at just some of the fun and games planned....
http://www.emsworthslippersc.org.uk/upload/ESSC%20JR%202015%20SIs.pdf (B) Also relevant to the weekend events is the fact that The Lodge will be having a special event this weekend and moving trailers will probably not be an option - even during the days running up to the weekend as contractors will require access and setting up equipment including marquees. At the very least you would need to confer with Mark.