I am sorry if this question has a very obvious answer- Husband and I are new to RVing, and we just can’t figure this out. Let me start off with equipment F150 28 foot TT 4 bikes We need to be able to tow our bikes for day trips without the trailer, but then when we go camping, we would like to bring the bikes while towing trailer. However, we are not wanting to buy two different devices. Are we missing an obvious answer? What is the solution? Is there one? Thank you.