I loaded Tamriel Travelers today and now I see a small problem where I actually have to be on top of a beast for it to recognize me. I actually had to step on a mudcrab for it to start attacking. Wolves that usually can spy me as soon as I see them and run to get me, just ignore me till I'm right up on them. However, NPCs in forts, etc. still run at me as soon as they see me from afar.

Is this a "feature" of Tamriel Travelers? Or a bug? I also loaded Woodelvendon today (a little Wood Elf village not far from Pell's gate - not sure a little town mod would change something like that).

Tamriel Travellers does not affect creatures, must be something else you are using causing the problem of creature not attacking correctly..

Unless you mean you added to your mod list then it started happening, if that is case try waiting for 24 hours so that aipackage can update themselves.

Post your load order

Are you sure you are not experiencing AI overload?