You should have saved your original RVFOREST.DAT file to your computer when you first loaded Homebrew, if indeed you did. If so, just copy it back to WIISAVES/RUUE/RVFOREST.DAT on your chip. Make sure you also have an apps folder with the following folder under it: Homebrew_browser, save-extractor, & save-installer. Then load it through Homebrew back on to your Wii.

PS, if you don't have the RVFOREST.DAT file, have someone send you theirs. You can use that and then edit their town to something you like with ACToolkit. Hopefully you saved your Friend codes somewhere so you can reinstall them as well