Iain
You will need to use a shipper for your bike and the best people to get your bike safely to and from Newfoundland would be James Cargo at
www.jamescargo.com. Great people to deal with and they are bike specialists. They will do all your paperwork for you and you can either fly it or ship it by sea. Air Cargo is more expensive on the face of it but your bike will be there very quickly and probably on the same flight as you.
A UK driving licence is fine but having said that, one of the guys on my Alaska trip was stopped for speeding in the US and was asked for an International driving licence. Luckily he had one so no worries and the cop was happy. It is not necessary by law but local cops aren't really up to speed with this so for peace of mind it may be worth having one and may save you sitting on the side of the road arguing with the cops.
You will need specialist North American insurance which you can get from
www.motorcycleexpress.com. It's not cheap but you do need it and go for the mid range policy which should set you back around $400 for 2 months cover.
If you are thinking of nipping into the USA, you will need to get an EPA certificate for your bike which is easily available on line FOC. This is a kind of temporary import permit regarding emmissions. I do know of people who ship in and out of Canada and don't get an EPA certificate even though they will be in the USA at some point. This is OK unless you have a big crash or something then you will be asked for the EPA and if you haven't got it, a minimum fine could be levied so be aware of this.
Canada is a fantastic place to ride but be aware that food and motel prices are very similar to the UK. Fuel is marginally cheaper but is creeping up.