Spikes are overkill and might give problems with TSA??
You are most likely to find either bare dirt or some snow that has been packed down. Spikes are not good on bare dirt (and really bad on rock); better on deep snow. The nano and yaktrak work ok on short stretches of bare trail so they are more flexible.
If you need any kind of ice/snow assist, make sure the trail you choose for that day fits the conditions. Snow that has been packed down by hundreds/thousands of feet is REALLY slippery. The nano etc will help, but they can't work magic. If you are on a steep hill (like Walters Wiggles) with people in tennis shoes (or probably flipflops

) around you waiting to take you out like a bowling ball, go elsewhere. Angels Landing gets all the hype, but only go there if it is bone dry. It's really too dangerous for most of the people who go there with zero experience (noted by their footwear). I think the trail past it is better, but you still have to deal with the conga line up Walters Wiggles.