I think there might be a bit of confusion underlying your question.

Time does not exist except in physical reality. It's a convenient illusion that allows us to play with ideas of linearity in this physical plane. But our experience of the linearity is always non-repeatable...Time Travel in the sense of Science Fiction movies cannot exist.

Sorry, Arnie The Terminator ...but you won't be back :)

https://www.youtube.com/watch?v=-YEG9DgRHhA

Here's an analogy that might make things clearer...

When you read a book, the experiences related in the book have already happened because the pages of the book are all written. You are holding them all in front of you as you hold the book in your hands.

But you experience the words in the book at whatever rate you decide to read them i.e in whatever way you decide to focus your consciousness within the book. And if you get bored of the book, you may not even decide to complete the entire experience that the book offered.

But even if you do complete the entire book and then decide to go back and reread it one day, you'll find yourself having a different experience with it even though it's the same book.

Perhaps knowing what's already in the book will change your reaction to it, perhaps different sentences will now seem more significant because of things that you've thought about since reading it, perhaps you'll take breaks from reading it in different places, perhaps you'll be distracted from reading at different points and not concentrate in the same way, perhaps you'll skip over or skim-read some bits you found boring the first time...and so on.

But no matter how much you try, the re-experience of reading the book will never be the same as the original experience.

Considering that analogy about reading the book, now when you say...

Has anyone time travelled keeping all their memories?

...it might make more sense to understand why what you're asking is not really a question that makes much sense unless you're in a Sci-Fi movie :)

You can't time-travel into a past experience because your experience will never be the same even if the physical reality conditions surrounding it are set up in exactly the same way.

Just because something has happened in the illusion of the past doesn't mean it's now a fixed event - it's still offering you a changing and evolving experience every time you revisit it...in a similar sense to you trying to replicate your original experience of reading that book.

Another way of looking at these ideas is that...

...All events past, present and future are happening NOW because it's your ever-evolving NOW consciousness that is interacting with them and evolving them through you giving your NOW focus to them.

So even if you were to somehow focus yourself into the vibrational frequency of those original events, it would be the YOU-of-NOW - with all the experiences that you've experienced since those events - that would be focusing there and not the YOU-of-THEN because that YOU-of-THEN no longer exists...it has become something more.

It is more accurate then to think of time, perhaps not as a linear concept, but an ever-expanding accumulating concept.

While it is true that all things happen NOW, it is not true that everything that has ever existed is experienced simultaneously! That is not quite true, for the NOW moment is outside of time. It is therefore eternal in the sense that when you have an experience it is possible to remember everything about the experience. It is alive within you forever. But the events can never be experienced/replicated in quite the same way, for all events are unique, and will be unique, never to be repeated.

From: Dialogues - Conversations With My Higher Self

It's a bit tricky trying to explain these higher-dimensional ideas by using three-dimensional analogies but I hope you get some sense of what I mean.