Last year we listed our 5th wheel first, on Craigslist. We waited the whole 3 weeks until it sold, and then listed the truck. The idea we had behind keeping the truck was, if someone needed the 5r delivered, we could do it.
I am not sure how many people are interested in purchasing a combo. You could try posting it on escapees I suppose.
If you have a dealership by you, wouldn't hurt to ask how much they will give you for them individually.
Some consignment places are ok, since a lot of people need to finance. Call and ask what they charge.
As someone stated, look on RVT and RV Trader and see what private parties are asking near your area for similar set ups. Dont go by dealer price.
We have sold many, many large ticket items on Craigs List, and have yet to have any problems. Scams are very obvious.
Sorry to hear of your misfortune. Best of luck to both of you, and I hope your wife gets better.