The others above are spot on. Finding a new destination can be very rewarding, particularly if you settle on the Upper Arkansas Valley. So much to see and do there, makes it well worth the additional time and miles, which are really not that much more additional.
Estes/RMNP are in my back yard, so to speak. I'm up there a lot. But I almost never stay in the commercial CG/Parks any more. It's usually inside Rocky at Moraine or Glacier Basin, or in the USFS CGs south of town in Boulder County. A bit of a drive to EP, but less frustration with the traffic and crowded/cramped CG/Parks in town.
Last time I did a commercial park was at the end of last season at Mary's Lake. Now run by the Town of Estes Park, they promised major infrastructure improvements. So far, I've not seen it, but they've only been in control a short time. Maybe this coming season will see some improvements.
If EP is still a preferred destination, consider Riverview CG and RV Park west of Loveland near the mouth of the Big Thompson Canyon. They've fully recovered from the devastation of the flood of 2013, and so practically brand new. Or consider Boyd Lake SP. Beautiful CG and it really is in my back yard (I'm on the "other" lake -- Horseshoe Lake).
Otherwise, it's looking like Elk Meadows may continue to be the only realistic game in town for you and rig the size you've got. Yeah, you can probably get in to the others, but no, you probably won't enjoy it.