As usual, what you say is correct. And your experience in the mountains and fishing and photographic skills are awesome. The knowledge that you (and others as well) generously share with people on this forum helps people be better prepared and further their travels, and love for the outdoors.
Mountainpegasus said while the first week of May is locked in, he wanted to experience the Sierra Nevada high-country. Bit of a conundrum there, what with the snow and all. So I considered how he and his friends can have a high country trip that's adventurous yet safe for that time of year. Do you stay low and avoid the snow, or risk the harrowing conditions that some others properly described?
Leaving out of Badger Pass and heading towards Glacier Point would be a reasonable way to experience high-country snow travel for five days. At the same time, being not far from the well travelled pathway of the road lends an element of safety if things get sketchy. Also, the possibility of navigation errors would not be critical. There's not much elevation change, and a minimum of avalanche danger to contend with. Yet they could still experience the cold and vagaries of snow travel to some extent. If they make it to Dewey Point or Glacier Point, unless it's a white-out blizzard, they'll enjoy some great views. And if they like the mountains in winter, like you and I do, maybe they would take off the training wheels next year and go for an epic Trans-Sierra trip, or something.
As we know, this would be a snow camping trip, but not a "winter" trip. Given the time of year, developing snow conditions (Hooray!), their age and current experience, I think a five day trip out of Badger Pass could be adventurous yet relatively safe, a great learning experience, and they would have a...uhm...real cool time.

Peace