Seajet
...
It's possible, perhaps even probable, that Gunwarf wouldn't mind you picking someone up with a dinghy, but where would you anchor? There's a prohibition on the Dockyard side; it's a naval base and they're twitchy about security due to terrorist threats. There's nowhere over that side I'd want to anchor up prior to a swift visit shoreside by Rubby-Dub, whereas you can tie up in Camber for a short while often without charge.
I've never seen anyone anchor in Haslar Creek, although there are places on the Gosport side, past C&N where you could drop the hook for a short while relatively unmolested. If you were planning a raid by dinghy on the ferry pontoon, you might be able to drop the hook in the space between Haslar Marina and the pontoon itself. The LSP used to keep their vessels moored there so it's deep enough at all states of the tide.
The RNSA have moorings inside the RFA fuel pontoon (cold harbour?) that might be "borrowed" for a short time, if vacant. Not strictly "polite" it's true. I've not been in Royal Clarence Yard since it became a Marina and speaking from memory, all the other access in the outer reaches of Forton Lake are bespoke by clubs (the CSSA, Gosport Cruising Club and the RA Yacht club?) all of whom have some sort of security.
Have you tried contacting Gunwarf and asking if they'd allow you to pick up from there? They might be OK with it. At least you'd know.
Topcat47,
good stuff and as you say at least Dan would know, though I don't rate his chances of anything for free around Gunwharf !
As you say, if visiting by tender, where will the mothership be ?
Still seems to me the Gosport ferry is best bet, but if late at night carry something casual like a broadsword & machine gun...