I purchased the Camco level. I didn't want to put any holes in the front of the trailer, and I thought that the small tube for fore-and-aft leveling would look dumb pointed at the sky. So I removed the tube from the aluminum housing and mounted it directly to the trailer with Scotch Extreme double-sided mounting tape.
I made little feet from 1/8" aluminum flat stock:
Front view:
I mounted the level where I can see it from the side mirror:
Did this last August. Since then we have logged about 500 miles with no issues with the level. Must say that it is really nice to have the big level, especially now that I am using the Andersen leveler. I just pull forward onto the Andersen leveler until I see level in the mirror. :)
Bruce