ACF 3.5 introduces a very simple way of carrying all your player data between levels.

Before traveling to the new level you can save a “snapshot” of your current player data with TravelLocalPlayer within the ALSLoadAndSaveSubsystem.

After that you can open the new level with a regular OpenLevel from Unreal Engine.

Once the new level is loaded you can restore the state of the current player to the last “snapshot” taken before the travel by calling LoadTraveledPlayer.