I'm going to be capturing intimate acoustic sessions for several bluegrass and string based bands at some upcoming festivals this summer. Most will be in relatively quiet locations outdoors or in tents.
Really, you don't want LDCs for this duty. Why? Wind. LDCs are very susceptible to wind noise, and difficult to protect from wind. Also, there aren't any RF LDC condensers that I know of (Rode or Sennheiser maybe?), so all of them are susceptible to humidity problems (you are outdoors, yes?). But you can get very nice RF SDC condensers.
The best option (given what little you've told us about what you're doing) is probably a mid/side pair of SDCs. Specifically, the Sennheiser MKH30 (side) with an MKH40 (mid). The Senny's are RF condensers and the go-to pair for exterior MS work for everything from nature sounds to music fests. That and you'll need one of the Rycote windbaskets that's specifically designed for this pair (how popular do they have to be to get Rycote to do that?). And yes, you are going to need that wind basket even in what you think is calm conditions.
The MS pair will be relatively easy to setup (like all stereo pairs, they need to be placed properly), needs only a single stand, is relatively unobtrusive, gives an excellent stereo image when used properly, and gives you some options to modify the image in post if you want.
A distant second choice might be a pair of SDC cardioids in ORTF or NOS. Again, for exteriors I'd look at the Sennheisers, either the MHK 40s or the 8040s. An ORTF pair will be harder to protect from the wind, but ORTF gives a particularly nice stereo image IMHO (about half loudness differences, and half time-of-arrival differences).
Much as I like the sound of ORTF, for this duty MS is a no-brainer.