What about the slinky antenna for camping?
I don't think there is any particularly good use for them.
For general camping and backpacking, I haven't found anything that beats simple dipoles
for versatility, small size and low cost. I carry 25' of coax with a center insulator on the end,
and as set of wires for each band of interest. That allows me to connect the wires that are
appropriate for a particular setup, toss it into a tree, and operate. Sometimes it is just one
band when I'm stopping for lunch, or it might be all 5 pre-WARC HF bands simultaneously.
The wires are pre-cut so I don't worry about tuning them in the field, and I usually don't
even carry an antenna tuner. I can set it up in 10 minutes or less (though it took me half an
hour for all 5 bands in Tasmania, in the dark, while holding a trout in one hand. But that is
a different story.) And, when circumstances permit, I can use the wires to form other specialized
antennas such as a half square or a loop.
For Field Day I'm not as constrained by weight, size, or setup time, and performance is more
important (especially when most stations are over 1000 miles away.) So I can experiment with
other antenna types, even multiple antennas. But I've operated Field Day with just dipoles and
still done well on QRP - in many cases it really isn't a compromise at all.