Hey Blair, if you’re staying on the beach side of Hastings you’re pretty limited in storing the boat anywhere including the public car park down the end as the council are pretty savage in fining etc.
If you’re on the opposite side where the units back on to the canal, some of the appartments have pontoons that I think you can tie up to if you’re staying there. I’m not sure where you’d store the trailer except for the boat ramp car park.
In failing that, you may be able to just anchor up somewhere on the canal but I’d check the laws etc on that.