Hi Mark,
I have not come across any references to camp guards using spontoons/pikes but I see no reason so suppose that they weren't used it that situation. As far as naval connections are concerned I came across this thread
http://www.swordforum.com/vb4/showth...ants-1792-1830 where Glen mentioned spontoons being used by Royal Marines although the kind he references are a later type utilising a cross guard.
Glen if you are about could you elaborate on the sources for spontoons used by the Royal Marines.
My Regards,
Norman.
P.S. Here's an interesting article on spontoons/halberds etc.
https://warfarehistorynetwork.com/20...and-spontoons/