[Blueprint] Server Travel, Fading In, Fading out etc.

Development Programming & Scripting Blueprint
1

Hi there.
I want to replicate map Changes like we had back in the 90s.

I have created an Actor which initiates a ServerTravel and serves as a connection between maps.
These Actors have 3 Strings: DestinationMap, DestinationIdentifier and Identifier.

I want it to work like this:

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&stc=1

ServerTravel MAPNAME somehow does not accept URL Paramters.

So ServerTravel MAPNAME?TargetID=3 does not work (TargetID is empty when polling the OptionsString)

I also want to Fade In and Fade Out when the Travel Starts.
Fade Out is no problem, But I can’t get the Fade In to Work.

How do I catch whether a Server Travel Occured?