Does it have the tow package?
Our 2012 Ridgeline does. We've been 50,000 miles all around the USA.. Florida from Maine twice
Arizona once ( including the Grand Canyon) and back to Maine
And to Alaska.
We tow a bigger unit than yours .. A 195RB
Our truck has 150,000 miles on it.
If you are not having transmission issues now you should have none on the way there despite the grades you will have to mount.. We can do 12 percent for a short distance without anything overheating
Just take it easy
2012 Honda Ridgeline
2016 195 RB
Both well used. Now up to 250 nights camping and 70,000 miles on the TT since purchase.