I see this post is a bit old, but I wanted to chime in. We had a similar issue on our first camping trip with a new setup. We had trouble communicating because of poor cell reception and the trailer’s metal walls. After some research, we ended up getting a couple of
Motorola two way radios. They worked great for backing the trailer into tight spots and for talking across the campground. We also used them on a family hike and found the range pretty reliable, even with kids running around.For your needs, I’d suggest looking into radios with decent range and clear audio. They might be a bit of an investment, but they make a huge difference in staying connected.