Hi Chriskit,
I think your outside wedding will be great! I had a carrot cake for my wedding cake and it was perfect! There was a yummy cream cheese kind of icing on itthat was very pretty.
I also did planning for all parts of my wedding and it was outside-so I'll try to think of some ideas for you. First, your wedding will not be tacky-don't think like that!
I think your centerpieces sound beautiful! Also, I am not sure what the temperature is like where you are but you might consider getting some of those metal tubs (the old-fashioned looking kind) and filling them up with ice and throw some water bottles in them. Tie a towel to one handle of the tub so the guests can help themselves to a drink.
Here's something to do if you want the guests to throw rice. If you get the tiny bags of rice (or make your own with a few yards of mesh fabric and a big bag of rice) you can make them pretty with a little card attached with a ribbon. We did this at my friends wedding-she liked butterflies so we got some cardstock or just thick paper and stamped a butterfly on one side of a 2" x 2" card (we even colored some of them in to make them prettier) and then on the other side we wrote the couple's initials (or you could do your new last name initial). Punch a hole in the corner of the card and slide a ribbon through it and use it to tie up your bags of rice.
And apples are not too expensive, it seems like you could work them into your decorations somehow. Just before my wedding a big storm came through and knocked a bunch of small pears off my mom's trees. we couldn't eat them so we stuck dowl rods into the bottoms of them and stuck them into the flower arrangements-maybe something like that could work with the apples? Or you could stack them into a tower shape using dowel rods for a fun centerpiece. You would arrange like 8 of them into a circle-then attach the two accross from one another with dowel rods. Keep doing this until all apples are attached with a dowel rod to another apple. So you have a circle of apples with lots of sticks inbetween-tie the sticks up with some string to secure. Now you can easily attach more apples to make the "apple tree" which will be a nice sort of cone shape when you finish. I hope this makes sense-I wish I could draw a picture here of what I'm talking about, lol.
And how about serving some candied/caramel apples for a treat at the wedding? I am trying to think of things that will go along with the apple theme. I will keep thinking and try to post more later.
china