The RVators have a flyout on September 1st:

“This event has been on the calendar for a long time and it’s here! This Sunday – not Saturday ! Open Cockpit day at Castle Air Museum!(KMER).
Castle Air Museum will open the doors of its historic aircraft on Sunday.
Only twice a year does this happen.
Lets plan for arrivals at 10:00am since there will be lots to see.
The museum does have a shuttle to provide transportation.
If you want to have a peek at some of the aircraft prior to Sunday go to their website.

Adults $12
Seniors. $8.00
6-17 $5.00
Active Military w/ID Free

KMER
Elevation. 191MSL
PA. 1189 MSL
Fuel. 100LL , Jet A. Price posted today $6.18
ATIS. 124.475
Tower. 118.175
Ground. 133.575
Appr. Dep 120.95

Hope to see you this Sunday!”