That's quite a spiffy little shack in the background there!
How liberal might you be with said custom assets once the map is released? Everybody likes a little variety in the scenery which is why I give free reign with any of the assets in my own maps...
Also, if anyone knows how to do a freecam (god mode) in game, please let me know !
I've only done it one way. Which I'm pretty sure is not the "best" way to do it. But I haven't gotten around to doing it the "best" way. So I wouldn't know exactly how it's done.
Anywho, you can simply increase the <Camera RadiusMultiplier="1.0"> value of any vehicle(in said vehicle's trucks XML) to something ridiculous. Say 25 or so. And "play" the map with that vehicle.
The other(probably "best") way I've heard of is to mess with the C:\Program Files (x86)\Steam\steamapps\common\Spintires MudRunner\Media.zip\classes\cameras\default XML.