Jane, I think the answer lies in your question!

Other than kicking steps without bruised tootsies, would your Meindls give you an advantage? If it's hard neve, maybe some microspikes or Yaxtrax Xtreme (which I am taking) might help.

However, our team will not go into full on winter conditions (we have FWAs for that sort of thing). We anticipate trudging over snow from time to time, but nothing too technical.

So, I would say, take what you feel most comfortable with for most of the crossing, and adapt/deviate if necessary.

Hopefully it won't be necessary

Jane

In my experience, you'll be fine in your Inov8s in the snow. Although this winter I did wear my boots when deliberately heading out into the snow, in previous winters I've been perfectly comfortable with Sealskinz and Inov8 Roclites in deepish snow. I wouldn't want to hang around doing nothing but if you keep moving then your feet should stay warm enough.

I am not taking my Kahtoola microspikes on the Challenge as I shall try my best to avoid any large areas of ice and snow but I'm happy enough to cross the occasional snowy patch in my Terrocs.

I agree with both the above, Jane. It's got a lot warmer the last few days. I think river crossings could be interesting.
Enjoy!
Vanessa