L-16's are a heavy battery with a lot of water in them. If I recall right, they are about twice the weight of the U220's or T-105's. They are TALL - like 16" tall, and have about 1" of water over the top of the plates, and are designed to stay in remote places, with generator back ups, not serviced more than once a year.
I think you will be fine. Even if uncovered for a little while, L-16's tend to come back to great service. Home Power Magazine did a story about recovering a set of 4 L-16's in a home that only had a back up generator, and the family left things on when they moved out. They where able to use one of these "Recovered" batteries in their main home power pack when they had a problem with one of their batteries in the main pack. Another pair of the old L-16's got installed in a older trailer not used for much, except visitors to the homestead where Home Power is written - miles off the grid.
So basically don't abuse it anymore, and you should be fine!
Good luck, have fun camping!
Fred.