An issue which is causing grief going either way is the number of boomers who are being caught with illegal drugs. Not just a little, but sometimes quite a lot. 401K replacement program perhaps? Who knows why someone who should know better suddenly tries to top up their retirement plan just once with a cargo that should not be in their RV, and sadly RV's are often what are used to do this dastardly deed. Hide it in propane tanks, holding tanks, etc and hope they will get through, make some quick and easy money, and have a nicer retirement.
We go across frequently as we live only a few minutes north of the border and do shopping frequently in Bellingham, WA, a half hour trip from doorstep to the city. We do not have problems although from time to time we are checked out and that is the price we pay for our trips. In the overall scheme of things it is just a small hassle and the pain goes away as soon as we are on the road again.
We hear constantly from folks that getting into Canada is no big deal. From time to time they are checked out to some degree but not often and nothing that would be considered out of line or overly intrusive. Yes, there are a few folks manning the stations who seem to enjoy the aggravation they can cause but for the most part they are few and far between.
Going south though can be a real challenge at times. We hear often enough from our US friends who come to visit, camp and tour that their return trips have about a 30% chance of being far less than fun. Keep your sense of humour, have all your paperwork at hand, and answer honestly and they are far more likely to treat you appropriately. They do take a lot of crap from some folks who travel and feel that any public servant is a tax burden so we find that getting through the US border earlier in the day when they haven't had to deal with a lot of difficult people works best.
The US dollar is now something like 20% more than the Canadian dollar. You get a lot of value for your money. Come visit Canada
and see what a great place it is to have right next door. If the US won't take you back not a problem, we have lots of room with only 30 some million people running around up here and can always handle a few more Airstreamers hanging around supporting our economy and shining up our CG's.