"MVP"......There are really none that are close by. I've lived in the area for 40 years and there is nothing near the library. I can see the library from my house.
The only available RV park where you'll fit, is just off Interstate 5 in Santa Clarita, about 32 miles from the library.
Valencia Travel Village - Castaic, CA - RV Park Reviews
The road in front of the RV park is an easy drive to the library. It runs through the City of Filmore, over the hill into Moorpark, and dumps you off in Moorpark, about a 1000 yards from the library....pretty easy drive. Simi Valley and the City of Moorpark are adjacent to each other. The library sits pretty much on the border between the two.
There is a Walmart in Simi Valley, about 6 miles form the Library that allows RV parking. Lastly, there is also an Elks Lodge in Simi Valley that has RV parking if you're an Elk.
Lastly, there is an RV park in Malibu that will fit your rig, but is a little more difficult to reach and would be more of a drive.