No date yet. Check out the ANN article for additional information. Synopsis of the source manga from AniList:
Setting up a tent, starting a fire, and eating noodles with Mt. Fuji in view…Rin and Nadeshiko absolutely love to camp! Enjoy their zest for travel and maybe even pick up a tip or two about roughing it in the great outdoors. You might just want to go camping yourself!
I wasn’t thrilled with season 3 compared to the previous ones, but I’ll still watch this one I think