The warranty is only one year. Who cares ? You're only exposed for a year, even assuming they could pretend the warranty was voided. Which unless the claim relates to something affected by the install, I doubt they would even bother. It's not like it's a hard drive with no user repairable parts, anyway.
This is probably worth contacting the factory for consultation before purchase - this kind of thing they USED TO do under custom ordering.
I think @pinstriper is right about the warranty. It seems to me other things will be more important considerations. For example, adding weight behind the wheels lowers tongue weight and vice versa. I went to the web site and couldn't figure out what would work on a Camplite. But, I'm sure any lift attached to the camper would need to be fastened to the under frame and not the walls. There's nothing strong enough in the walls to support it. Left-right balance as well as ground clearance might be considerations too. This is something really worth figuring out and I hope LL will help.