I've observed that the number of backcountry travelers out there has increased, or at least not diminished, certainly in the more well known areas. Web beta, more guidebooks and lists, larger population, gyms, whatever, but there seem to be more people of evidence of people (slings, burned in climbers trails, etc) than there used to be. It's not an explosion of people by any means, but there certainly out there. With better weather and conditions beta, multiple parties are showing up when conditions come in, rather than just one. Perhaps better information has just resulted in better timing; everyone shows up at once, rather than more overall folks. Having said that, it's still very easy to find complete solitude.