Spouse left behind after death at a Campsite, what to do?

There are two major Medical Emergency groups: MASA and SkyMed. GoodSam offers a similar plan but don't think it any where close to either.
Their moto is "We'll get you home". In the case of RVers they will hire a bonded transporter to get your rig home, and in the case of a death will make all the arrangements for transportation of the body.
Neither are cheap, but gives you peace of mind if and when that event occurs.