I absolutely understand the dilemma Vimal - where it comes to challenging the lockdown measures such as masks.

Let me offer an observation: the more we acquiesce to the lockdown measures, the stronger they seem to be getting - right?
Clearly that's because of a hidden agenda of controlling society and also manipulating our health/DNA etc.
So the question in any given circumstance would be: firstly, what does my soul say? Secondly, how much freedom am I prepared to give away for an apparent cost?

So in your example, you list the apparent cost...

By protesting this now I could ruin the camping for my friends, I could be booked and arrested and even beaten up.

Yes, any of this might be possible. But the same question holds - what is the price of your soul? And your freedom?
I also definitely believe it's right to "choose your battles". But if as a society we continue to acquiesce, then humanity will progressively lose his freedom and democratic rights. I find the teaching of Gandhi against the British Empire in India an inetersting analogy. BUT it is a different situation for sure. I do still believe the lesson holds true...