Selecting "Resume Later" for Extended Hike

It might but I would not recommend doing that as the activity might get confused with the different dates - there have been posts in the pasts about this. If you want a continuous track as the end result use the File Combiner in Fit File Tools to join them afterwards

At least on Fenix 5+ it's ok to stop and activity and resume it next day. It doesn't confuse the watch or Garmin Connect. However, I stopped doing that because then the activity still shows only on one day (the start day) on the Garmin calendar. If that's ok with you, recording the activity as one huge activity is probably ok. I've swithced to recording each day separately (still stopping the activity for longer meal pauses etc, and resuming when I continue), it's actually nice to see the journey split into each day. As Philips said, you can of course combine the fit files later, if you want to get the whole journey.

Thanks for the replies. So I guess I will split the hike into separate days. Don’t want to confuse things.

You can always try and 'simulate' it at home?

I've always had good experiences when using "Resume Later" on multi-day backpacking trips. The "resume later" function doesn't work right on my son's Instinct (it always automatically resumes after like 5 minutes for some reason), but it works great on my F6X.

Using the above file combiner technique might be a better and safer way to do it, though. I haven't tried it myself (haven't needed to), but I might give that a try next time.

Resume Later works well on multi day trips. I rode for 8 days with my Fenix 5x and used Resume Later each day and it worked perfectly. At the same time I also recorded individual daily trips with my Edge.