If you are going to be considering some larger units like the 23MB then verifying your Tundra's payload capacity is very important. The 23MB could have a tongue weight upwards of 800lbs or more. I haven't seen your payload figure - if you can get that off the drvier's door sticker then folks can provide much better input for you regarding potential units. Look for the yellow sticket with the phrase "The combined weight of occupants and cargo should never exceed XYZ kg or ABC lbs." and post the value from that.