As with my walk last year, I will bring 3 tests with me. I do not expect to get COV and I've just had my 5th shot, so I'm not worried about being ill in particular... and with the lack of requirement to isolate, I'm not especially worried about that. But, I want to be able to test again 3 days after a positive test, and again 3 days after that... Why? Because there is some concern that low/no symptom COV can still have cardio complications *IF* one exercises too strenuously while infected.
So, if, like me, you fall into a pre-existing condition, you might want a few more tests. I removed the box and put them into a sturdy zip-lick bag (the one that supplies my Black Diamond pole tips). In a remote stretch where you might have trouble finding an (open) farmacia on arrival, I think that if you are concerned enough to take one test, that three are better.
Take that as you wish...