"If i do end up sleeping in it,it will be because i fell into it pissed!"

An important distinction when it comes to trailers!

I'll offer one more bit of input before leaving you to posters who can directly address your questions (rather than strew red herrings in your path): Although I own a small trailer and could tow it behind my small-ish (by American standards) car, I've never taken it on a road trip. Instead, I mount a roof box into which all my camping gear fits easily, along with stuff I don't want inside--smelly boots are prominent in this category--and anything else lightweight but bulky. Its carrying capacity is limited to a couple of hundred pounds/~100 kilos, but that's a lot of bedding, tents, clothing, chairs, skis, and the aforementioned boots. Camping gear--or at least, my camping gear--doesn't really weigh much.

Disadvantages to this approach include increased sidewind profile and fuel consumption, but these are not as bad as they'd be with a trailer. I leave the box in place much of the year, since it's never really in the way even when not in use. It was cheap to purchase and is free of ongoing expenses or maintenance. However, it doesn't trumpet "rugged adventurer out here having rugged adventures" the way a trailer might--this could be considered a drawback or a bonus, depending.

There's no doubt I'd bring my trailer if I ever had to carry hundreds and hundreds of pounds of supplies--including if I were bringing a motorbike along--but so far I haven't, and don't. Take that as a single data point, and have fun doing what works for you.

Mark