Tundra is a nice looking truck . I was always concerned about the lower mpg, shorter 5ft bed having less storage as well as less payload.
With a small 26 gal tank I need the most miles out of a fuel tank and I carry a lot of fishing gear and tools. The numbers on the Tundra scared me off.
Fuel mileage isn't the Tundras strong point but it isn't as bad as people make out. 2016 brought on a bigger 38gal fuel tank as standard which I believe is now biggest in class.
The 5.5' bed is standard on the crewmax but the op solo with a little dog would be very comfortable in a double cab which comes with a 6.5' box. An 8' is optional.
Payload can be a little on the low side, but plenty for the op and the trailer she wants to pull.