Create scenes in SketchUp that show the model as you need to show it in your LO document. Make sure the scenes are saving camera properties and that styles are updated for the scenes.
If you want to be able to show the model to a specific scale in LO, make sure the camera is set to Parallel Projection in SU.
Make sure you are using SU’s layers correctly. That is, ALL edges and faces are created on and remain on Layer 0. Only assign components and groups to other layers.
Turn off the layer visibility for entities that aren’t going to be seen in the scene.
Before you get too far into placing viewports and other entities, at least set the paper size. Use the largest paper size you expect to print that document on. Best would be to create your own template with the correct paper size, layers for entity types and things like borders, title blocks and boilerplate stuff.
After getting the first viewport in LO by using Send to LayOut from SketchUp, set it to the desired scene in the SketchUp Model panel. Don’t touch the Standard Views drop down or the Ortho button. The settings you could make there are already part of the scene you’ve created in SU. Select the scale if appropriate–your plan views for example.
Do not double click on the viewport or do anything else that makes the scene show as modified in the SketchUp Model panel. You can drag the edges or corners of the viewport as needed to resize it but there’s no need to do anything that creates a modified scene.
As for layers in LO, create layers by the sorts of entities you’ll have in the document. Text, dimensions and other things that you might want to show over the SketchUp viewports need to be higher in the list than the layers for the viewports. I frequently stack viewports so I have several layers for them. Here’s an example of the layers for one of my templates.
If you need to go back to SketchUp to make changes to the model and you need to change scene-specific things like style settings (section cuts display is a style setting) shadows, camera position, layer visibility state etc., make sure you update the scene after making the changes. Then save the SKP file. In LO, right click on a viewport and choose Update Model Reference.
If you keep those viewports attached to the original scenes in SketchUp and don’t do anything to modify the scene in LO, you’ll find that everything works as you expect with no surprising moving models or weird dimensions and labels.