Our Family friend and protector Dakota deceased no over a year, kept the squirrels in check.
He grabbed them head first or rear first and clamped don in the middle.
I wish he had't bothered the Chipmunks though.
Pretty much anything in the yard was fair game. The last squirrel he got coming out from under the truck. So if you have a farm dog of any of several breeds, or mongrel he might solve your problem. Keep him a softer bed and food, He'll get it before the critters get a chance, under the RV or Dog House near it.
Dakota his last few years stayed in our home with us. Wish I had brought him in earlier. When he was out which he preferred until that one cold spell no critters go to chew on anything.,