Yep, it'll be fine. Just before I left for a year in Afghanistan, I made about 8 beers and 4 meads. The wife was willing to babysit the airlocks, so I used a mix of glycerin and water in some, rotgut vodka from base in others (don't drink it; I swear it's a carbon group short of kerosene). The glycerin mixture lasted quite a while longer than the vodka. When I got back, I'd only lost one batch (a westy 12 clone...zero body and tasted like wet newspaper. Pretty sure that one oxidized).
Your mead will definitely benefit from being left to its own devices while you're gone; I have two meads bulk-aging and a Christmas ale bottle-conditioning while I'm deployed this time. Good luck!