I was at a meeting with them, so unfortunately not available for trips round the bay
You could get a couple of bikes on the ramp, but the rest is under cover for the troops.
When we left, one of the bigger ones was preparing to leave Plymouth and go round Lands End, as they practice beach landings on the North Cornish coast, on the soft sandy beaches. Better them than me going round Lands End in a flat bottom boat, bad enough in a normal one, although they only go when the weather is set good.
If you want a simial experience, go for a ride on the Wash Monster at Hunstanton in the summer