The difference between the Frontier and Colorado was night and day. With the Colorado, no more fears about the hills, and it was nice to stay with traffic at highway speeds. Trailer towing mode is a blessing. Now, when I come up to a semi, I feel confident about passing without pushing my foot through the firewall. My trailer is a single axle as well which makes towing and maneuvering just a bit easier, but of course, single axle trailers are usually smaller. If I understand correctly, the hitch setup on the dual axle trailers requires the trailer and truck to be very close in line horizontally to ensure equal contact with all four trailer tires. My trailer sits up just a bit at the front, but not a problem with the single axle trailer. With respect to loading, on my trailer, Palomino suggests that if you are loading the trailer with camping equipment to try and stay over the axle and forward. You may want to consult your trailer spec's for your hitch weight and the GVWR of the combined loaded truck and trailer. I loaded most of my stuff in the box of the truck and it had no effect on pulling the trailer. Also, I don't pull with water in the tank(s). Not only is it heavy, but the water moves with the stop and go traffic.