Just went to the storage yard to take a real good look at that battery; even used my reading glasses this time. There is nothing on it to indicate it is a maintenance free battery, but that's not to say it isn't. Since this has been going on four months and 6,000 miles and everything is working ok, (it holds a charge, the engine starts, it doesn't need water), I just used some of the ever-useful duct tape to hold the caps over the cells. I left it loose enough so there is room to vent but the caps should stay over the cells to keep out any stuff that shouldn't be there.
Thanks for the replies.