Okay, get ready to get your thinking cap on because this gets a little complicated!

We are planning to have our wedding in late may. No invitations have been sent out yet, but we are more in the planning stage.
The theme is a rustic, country wedding. The ceremony is inside but the reception is outdoors.
Our invitations/rsvp cards/thank you notes/envelopes (basically all stationary products) are kraft which is a recycled paper and is like a light brown color. We are threading binder twine (which is used on hay bales) and I would like to, along with the binder twine, thread some colored ribbon through there. The only problem is I can't decide on what colors I like yet go with our other plans AND the season! haha
The one thing I have to make sure I get is the guys want camo vests. That works fine with the brown of the invitations. I would like to have tanish bridemaid dresses, and I found some super cute ones that aren't too simple but aren't crazy either!
My favorite flower is the tiger lily, which is a summer flower, but I feel like the brown and orange will look too fall like

I know the brown is a lighter brown, but I just don't want it to clash with the season!
Would it be too much to do the camo/tan with orange AND another color?! I thought about yellow to bring a little more late spring/early summer into it, but I just worry then we're getting too crazy! haha
What do you all think?