A little off topic, but do companies like Horizon allow you to just work seasonally and or carry passangers while transporting? I've often considered picking up some extra work during the summer months while I'm not at my regular job and the wife and I love to travel. Most years, we could run much of June, July and August.
Dick Trombley answered your question about seasonal work with Horizon. Horizon requires you to haul at least one trailer each month because they are carrying all their drivers on a group commercial liability policy which costs them money whether you are hauling or not.
Other transport companies have different rules and would probably allow you to work seasonally only.
If the company is aware of and approves a passenger such as your wife it is probably okay. I think Horizon had a few drivers whose wives road along but I don't remember for sure and don't know what details might apply.
Quality Transport, STAR Transport, and others operate in the same area doing similar work.