If it aint broke, dont fix it!
I learned pretty early in the RV game, you need to get some PEX fittings ( 1/2") and the tools for it. The initial investment isnt that big. And at any hardware, lowes, home depot, or menards you can get the fitting pretty cheap. Its easy to do the install of these components for a fix. And when you are on the road, and need them its awesome to be able to take of business right on the spot. Never used sharkbite fittings, but they are more expensive than just standard PEX. I leave part of my basement walls out, so I can see all of the plumbing runs at all times.
I carry multiples of the various fittings, as well some lengths of blue and red tubing. A water leak can pop up whenever and you dont want to it let go.