I'd been pretty on top of things until the other night. I was sailing around gathering mussels, about half a supergrid or more away from my home on a river that I had to carry my boat across land for like 10 minutes to get to. I already have to carry my boat for about five minutes just to get to a river since I live well away from them.
Suddenly I found the largest cluster I have ever seen. Both my crates were full of mussels and my inventory was nearly full. After gathering about ten of them there was still 10 or so left and another large cluster nearby. I thought, "Dang... Why can't I hold all these mussels (limes)". Putting my greed aside, I go to pick up my crates and shove them in the boat and, oops, I hit my hearth key. Great. So fifteen minutes or more later I get back to my boat, get out to load the crates again, and BAM, hit the hearth key AGAIN.
Three boats and something like an hour for two crates of river mussels. On the plus side I got even more because I kept emptying my inventory when I accidentally hearthed home. I got one shiny pearl out of it.