Mate if u cant swim wearing an inflatable pfd is a must.your life is too valuable.
Also make yourself a checklist for cross reference before depature.Include everthing eg
bungs,pfds,water, food, bait, fishing rods, tackle,knives,bucket, ice,sunnies, hat, wet weather gear, anchor , fuel, oil, first aid box,small emergency tool kit, map,torch, etc
Purchase a small padlock for the trailer hitch,so u cant miss hitch(padlock wont fit if not alligned)
Check trailer lights and wheel bearings!!!!
And check the latest weather