Personally, I don't think it's much of an advantage seeing as how you can only use this method 48 hours before the hunt. We all know that critters, especially elk, can be miles away from where you spot them in 48 hours. So, unless a guy uses his ultra light to spot them, plots the coordinates on the GPS, parks the ultra light, hikes in the next morning and keeps an eye on them till the opener, it doesn't really give you an advantage at all. It can sure give you a good idea of the quality in the area and what to hope for, but that's it. So for me, if you happen to own one of these flying machines, go for it.