Every town within 100 miles of Yosemite calls itself that. Just Google "Gateway to Yosemite".
N
ow, as Paul Harvey used to say, this is the other side of the story . . .
First, I've lived in the area (Mariposa) for several years and have
actually been to and camped in many of these places.
Lou's post would be loved by Fresno/Oakhurst chambers of commerce. If you like VR, logging trains, smoky casinos, and international airports, then take his advice.
But, OP, it sounds like you'll be towing your Little Guy Mini Max behind your 4Runner and
not be flying into the area, right? If so, here's what I recommend . . .
Number One: Avoid driving into Yosemite. Since the reservation system has been scrapped, it's a zoo. See my link in #8.
Number Two: If you must drive, look for a campground along Highway 120 like the following. Don Pedro might be your best bet. It's about 40 miles from Yosemite:
Number Three: Let
YARTS do the driving. I assume you plan on dropping off your towable at the campground and driving into Yosemite with your 4Runner. You could also take the bus and avoid the hassle.
Good luck.