Hey ,welcome to the forum !, You'r 75 gun sounds ideal for the UK!
I would change the bands if they are 2 yrs old - you wont get optimum performance out of these!
You dont need a reel , because most of the fish we shoot around here are in the 1 - 5lb range .
You'r wetsuit will be fine - although an opencell would allow you to stay in longer, I have a Diveskin.net 5mm suit which im well chuffed with.
Dont worry about loading - it is much easier in the water, practice chest loading!
Id say that the season for us in the Uk finishes around October ,reasons being - viz would be crap in winter [i would imagine] ,daylight hours reduced , less fish around the shore [pollock,bass,mullet], also it would probably be bloody cold...
Have Fun
