Blimey Alice you're very knowledgable for a girlie!
It makes a lot of sense to give the bearings the once over before the Journey, Also bear in mind that trailer tyres is special and not really car tyres so steer clear of the scrappy.
If you can get matey vendor to measure the PCD for you then you could buy a proper job at Towsure which is less than a mile from the red funnel terminal and more or less on your way out of town