Doubutsu no Mori (Import) Tips

Carry more stuff
To carry more stuff, let's say, the fruit from your town to another town (with different fruit) to sell it (for 500 bells each), fill your space for letters with letters (of course). When your pockets are full, ad it asks you if you want to swap or drop, say swap, and simply place it in the letter. It will show up as a small present alongside the letter (whether you wrote it or not), and you will be able to retrieve these items whenever you want.