I put Tire Minder on our 37 foot Jayco Eagle plus their antenna booster. Do some "shakedown" trips to ensure it functions as you expect. I had to install a second booster in the pickup bed to have the monitor receive the signal from the trailer's rear axle and spare tire. Yes, I put one on the spare so I don't have to crawl under everyday to check its pressure. You DO check you tire pressures everyday, don't you? The Tire Minder system lets you monitor up to 22 tires. So why not put one on the spare. I also have one on the spare for the tow vehicle. Also, carry enough spare batteries for each of the transmitters.
The 5th wheel is impossible to jack up to change a tire on, which we had to do 200 miles before crossing into Alaska. Thankfully, the Tire Minder alerted us to a low pressure situation before it went completely flat, shredded, or blew. The only way to raise a tire on the 5er (twin axles) was to roll the good tire up and onto the ramp from Trailer Aid. Got ours from Amazon.
https://www.amazon.com/Trailer-Aid-T.../dp/B000I4JPZE
I had driven the Alaska Hwy before and knew the conditions we were getting into, but this time with the 5th wheel. My concern was how much of a beating the running gear was going to withstand. Besides the tire pressure monitor system and Trailer Aid, I had the wheel bearings replaced with higher quality ones. If you don't replace, at least do a repack on the ones you have. Getting any kind of service is painstakingly long, especially in Alaska.
Ditto on the "Have Paperwork in Hand" for both long guns and pets. Read the rules BEFORE you get to the border. One last point on taking guns into Canada. If you want to bring them back home to the U.S., stop at U.S. Customs on the way OUT of the country to declare them outbound. You'll need the form you fill out there as proof of ownership to bring them back legally into the U.S. I was schooled by the U.S. Customs Officer when coming back into Montana. He finally agreed my Canadian form for the initial crossing was acceptable proof that I owned it 2 months earlier.
Make reservations for RV parks now, especially Alaska. In fact, you might be too late for this summer's season.
I can't emphasize enough the tire pressure monitor system and the Trailer Aid (for twin axle trailers).
Slow down and enjoy the ride...you earned it.