I bought a Compact Junior in Portland through this site and had no major difficulties. I think I became an object lesson for the new guy. If the trailer is 15 years or older it is not subject to the vehicle inspection. Make sure that you have a paper trail that gives and shows ownership, permits, titles, registrationsand bills of sale. It is helpful to make sure all the names agree so that customs can be sure that the person who sold
it to you was the rightful owner. I found it helpful to stop at the Canadian border crossing and check with them before going south to make sure you have everything in order, if you can do it at the same crossing as you anticipate coming back into the country it is better. and if you can cross as a less busy crossing that might be helpful as well. Get the name of the person who gave you the info going into the USA so that if there is any problem you can show that you have been deligient before hand. Also talk to ICBC before hand through the broker you usually deal with.