Will you share some pictures of your tea sessions at the farm with us later? I'm very keen to see!
As far as gear goes, I noticed after numerous mountain pours, that a thicker walled vessel brews better outdoors due to wind convection heat loss (this is why I'd be concerned with a titanium gaiwan; titanium cools very quickly).
I'm a bit worried about that too, but I requested a price anyway -- it's so shiny! More likely going to get the celadon. Thanks for sharing your photos, setups are very beautiful, and with the surroundings it looks magical!
I don't know what the elevation and weather will be like at the farm, but when I brew outside in the mountains here, around 6,000 ft. elevation, the tea vessels cool quickly and it changes the brewing variables. I'm sure you'll find a way to get good tea going. For me, that green shib set in the pictures works the best in cooler weather. You can see that the cup walls are pretty thick and durable as well. Plus, it's a production set (like all three sets in the pictures) I bought in Taiwan last year so it's not irreplaceable if something happens to it. Though, with the shib and two cups placed in a tea tin with two tea cloths, I've hiked pretty far and not had any problems with bouncing around or breakage.
I have also just settled for the vaccum-sealed, metal-screened tea thermos and gotten by just fine. But there's something about having nice teaware in a beautiful setting. There are also bunch of inexpensive, mini travel sets that come with there own bag that can be bought fairly easily. I have one such set bought in the airport in Taiwan (the white shib set in the pictures by the stream) that comes in a padded case with six cups, a shib, and chahai, all tidily placed together. I paid $30 for the set and it's been durable and nice.