If you want to major in engineering, then you will want to attend a university that is ABET accredited. There are a LOT of very good universities that are ABET accredited for multiple forms of engineering. This probably includes your in-state public university (or multiple of your in-state public universities if you come from a large state). You do not need to attend one of the very highest ranked and most famous universities to do very well as an engineer.
For the large majority of very good universities, ECs really are not all that important.
Even for the most famous and highly ranked universities, you should participate in the ECs that make sense for you. Being a camp counselor is a very good EC. Helping to take care of a younger sibling is a very good EC. Being on a swim team is a very good EC. Being a lifeguard is a very good EC. The point is to be responsible and work well with others. This sounds like what you are already doing, and doing well.
Also, your ECs do not need to have anything to do with your intended major. Some top schools (Harvard and MIT come to mind) do not even admit by major.
By the way, you might want to read the “applying sideways” blog on the MIT admissions web site. As I understand it, it recommends that you do what is right for you, and whatever you do, do it well, and treat other people well. It sounds like this is what you are already doing. This approach of “do what is right for you” is what my family has done, and it has worked for us (at 8 different universities for the four of us, one each undergrad and a different one each for a graduate program). However, what we each did was very different. We each just did what was right for us personally.
In terms of ECs, I think that you are doing very well.