Why not carry both and have the best of both?
...
Carry both and more: small 5", stout, fixed blade.
Only with a very extreme backpack load would this be a burden.
I carry a walking stick and 5-6" knife, in any case, nothing to do with animal protection.
The Kukri machete has such a devastating cutting blow and reach that I actually feel it would have serious stopping ability should I ever ha" ve to engage a mountain lion with it, yet it is still small enough for close quarters.
As to 12" and greater being too big for close quarters: mostly true for getting them out of
the scabbard. From there on, you could use two hands to good effect. Go to a SE asian
stick/blade fighting guy, and ask him to demo: using your own body parts as a fulcrum
and pivot point for your weapon. (body parts= head, forearm, hip, etc.)
A bent blade provides advantages and disadvantages. A kukri is very vulnerable to being twisted out of your hand. Any "bent" blade makes you vulnerable in this way.
bear spray is far and away the best defense against lions, dogs, ...US Fish and Wildlife did a study that found bear spray to be the most effective way of stopping a grizzly or black bear attack even compared to a powerful firearm.
I do not like to "pile on" but really there are so many biased studies being done;
do you really trust the USFW? I do not. The high up bosses in any agency or
eco group can control the parameters of the study.
For example, Wolf attacks on humans, can be counted only if you can show the wolf
was not rabid. WTHeck? Or, they say the wolf would not have attacked if you did not
have dogs with you.
Still, I would consider bear spray as an option, and I may get some.