If you are taping at outdoor open air festivals bring two stands, set em up 6 feet or so apart, sit back and enjoy.
Omni's are my favorite pattern, they are so unbelievably "natural" sounding... no coloration whatsoever. You'll know what I mean when you run them. I like them so much I'm playing around with running them indoors.
Omni's can bring some serious lowend though... the bass sounds very natural but goes waaaayyyyy down there.
as for windscreens... well, with omni's you can get by without windscreens at all... but the dpa's would be fine too.