Fascinating ghost story there Keith, i wonder just how many anglers experience paranormal stuff like this...i remember hearing a similar one some years ago where a party were on a staffordshire mere i think..but i'll leave that account to the guy that told me..he's not far away hehe.
The other thing you mentioned could be Sleep Paralysis or the 'Hypnagogic State'..both of those can occur more regularly when any sleep deprivation has taken place i believe...a kind of half waking half sleeping state.
Maybe the minds open to suggestion of spooky stuff at those times.
The coach and horses though, thats something else...well spooky!!
Yuri.