As Toby already wrote, Cabarete is a great spot for March (and one of my favorites). To be honest, if you have the budget, I would definitely go to Kite Beach (and not Bozo Beach) since I like the conditions more at Kite Beach: the chop and shore break is not as big as in Bozo and the reef (with perfect kickers) is closer and not as far out as Bozo. I would just store my gear in one of the many kite schools or if you stay at Kite Beach you can literally go from your bed to your board. Otherwise you could also rent a moto and drive back and forth with your equipment every day. Plus Kite Beach is in the middle between Cabarete Town and Encuentro, the Surf Spot, so you can drive to both in very little time.
I also wrote a detailed spot guide about Cabarete here: http://wakeupstoked.com/kitesurf-cabare ... -republic/
Since someone asked: I've been living in Cabarete for a year (and came back for numerous holidays): I'Ve been using the moto taxis the whole time I was there but yes some drive crazy and at night, when you're driving home from a club at 3 a.m. your driver sometimes smells more like rum than you do. Still, I used them a lot and if you use your guts and just choose a driver you trust you won't have a problem.
In general, don't leave your iphone next to you on a table when dancing or it might be gone, as well as your gucci handbag (if you posess something like that). I'd always be a bit careful but it's not like it's a crazy dangerous place. But of course, some people are extremely poor and if the opportunity is there and your iphone is lying around, it might be gone. As well as if you leave your bar out at night on the beach. So take a bit care of your stuff but in general it's pretty safe, I didn't have any major problems.
I'll be heading to Cape Town first time this year (after having been to Cabarete like 5 times already) so after this winter I'll know more about it