In the sense that you haven't laid out a clear boundary to the "other people". You don't have to go on a cruise ship to get away from email etc. You just say, "I'm offline from x to y".
I suspect you are not comfortable actually telling the other people this - I'm not sure if it's employer, customer, or family. In all cases though the right solution is to be clear, and give advance notice. There will likely be some push-back (especially given your past behaviour) but be firm.
Feel free to browse all you like. Feel free to post pics to Instagram. But resist the urge to answer emails or messages. Let that wait.
Ultimately people will treat your boundaries based on how _you_ treat your boundaries. It's a you problem first, not a them problem.
Seriously. Set boundaries. Using "no access" as an excuse implies that if you're reachable you're on the hook to serve other people's desires at all times. People need to know that there are times in your life that are reserved for you only, and some people have a problem with that, so you have to tell them yourself in no uncertain terms.