Hi Dave,
Like you, we tow with a 2018 Highlander XLE. I saw on a post a while back that you were able to put a full sized spare in the place where the donut spare goes. Did you have to do any modifications to make it fit? We often are in state parks here in Colorado that have less than easy access should we get a flat. A full-sized spare seems to be a no-brainer, but it would be nice to put it under the vehicle rather than in the rear where it would take up enormous room. I'm looking for any how-I-did-it information before I go try to make it happen.
thanks very much,
Catherine (aka, Outwiththedogs).