One of the comments DID suggest that I write a log of the things I found helpful or that I wished I had thought of in order to help other daring parents who decide to camp with infants in the future. So guess what?! I am!
The Noise Machine. When I packed the noise machine, I honestly thought I was being stupid. We were camping in a tent which doesn't have walls. How is a noise machine going to help? Isn't nature God's noise machine? ;) However, it was a great "wash" of noise. We set it on the rainstorm setting (which is what we use at home), and I feel like it gave some sort of constant noise to help the twins sleep even though we were all talking at the picnic table outside the tent. We left it on pretty much the whole weekend (which is what we also do at home...because we always forget to shut it off), and maybe it was just for the fact that it was the same thing we use at home? I don't know, but I feel like it was a good thing to bring.
A Box Fan. Our intention for bringing the fan was just for more noise. With the above mentioned heat in tent, it was definitely nice to have the fan to keep the twins cool as they napped. The noise was an added bonus. Our tent neighbors said they either didn't hear the babies wake at night or that it didn't keep them up, so I like to thing all our noise makers contributed to that as well.
Baby Food Pouches. On the subject of feeding the babies - I totally wish I had brought the little baby food pouches that they can suck the baby food out of. The twins are at the point where they basically feed themselves with those things. I literally could have handed them those and been done with the feeding. Instead I was trying to manage sitting one on my lap and spoon feeding. For Kohen, that worked pretty well, but Kennedy is a messier eater. :)