Your wife is probably capable of learning how to tow it.
But if something happens to you, she is not going to be in any emotional condition to face the challenge of a long trip north, likely under some time constraints.
My recommendation is that she needs to be familiar enough with towing & hooking up, the weight of your trailer and how much tow vehicle it needs, and the basics of winterizing, so that she can talk to someone intelligently about it.
If your trailer is going to be towed north in the winter, with no one using it on the trip, it needs to be winterized before it leaves Florida. There is probably someone at your RV park who could do that (assuming they could find some antifreeze to do it.)
My suggestion is to make contingency plans and write them in some sort of notebook, so that she doesn't have to try and remember it all at a stressful time.
It's a good idea to have emergency contacts, contingency plans, insurance info, and all that type of thing, organized in a notebook or file folder. Makes things much easier on family.