Large Helium balloon for locating RV when riding

Many of those balloons not only serve to let you know where your campsite is located, but also serves to let others (who know your markings) know your present and where you are. I use to have a small 16 foot blimp shape balloon but alas last July a freak monsoon haboob destroyed it. I now have a more standard 8 foot round balloon. I do a type 20 industrial grade helium cylinder swap at the local welding and gas supply store.