David,
I know Beccles quite well, I lived there for a while whilst working in NWI and staying with relatives.
After the 1983 incident BA Helicopters, as it was then, took the effort and expense to travel up to PLH to debrief us with what they went through regarding the AAIB investigation, the press intrusion etc. I'm guessing this was a kind of 'thank you' for the Twotter doing it's bit to assist that day.
A couple of hovercrafts might work, a small one and a medium one, operate them both during the high season, either just the small one (perhaps 25 seater) during the low season and/or turn the medium one, or both of them, into a 'combi' for the low season carrying freight also.