You could try pasting a camera into the .dae [edit it with Notepad++ or similar plain-text editor]
<camera name="eyepoint">
<optics>
<technique_common>
<perspective>
<yfov>45</yfov>
<aspect_ratio>1.33333</aspect_ratio>
<znear>0.1</znear>
<zfar>1000.0</zfar>
</perspective>
</technique_common>
</optics>
</camera>
add the value for the Sketchup.active_model.active_view.camera.fov
add aspect_ratio as Sketchup.active_model.active_view.camera.aspect_ratio IF it's set, BUT if it's not [==0.0] then use say 1.33333 ?
Then add znear and zfar set the view limits in 'current units'.
Paste the code inside the main .dae files code here near the end [?this_is_a_guess?]
</scene>
HERE
</COLLADA>
I don't have the faintest idea what I'm doing but it might work π
???