Finally. I did it! I towed the trailer WITH a horse inside! My daughter was at a show over the weekend and my husband was at home so it seemed absurd that he drive 45 minutes to the show only to load and drive another 45 minutes home (not to mention gas $$) so I did it myself, freeway and all. I took it pretty slow and probably really irritated some other drivers but I wasn't too concerned with that and it all went really smooth.
Anyway, I just had to share my excitement! I want to do it again even!