Does the big covered picnic area have electricity ? And do they clean them good if you reserve ?

Yes on electricity. You should bring tablecloths since it he tables are often dirty.

I would call City of Modesto, Parks and Recreation just to verify

Take a cleaner, paper towels and make sure you have plenty of TP cause the bathrooms run out when there's gatherings. Take garbage bags too. Big ones....there is electricity. Make sure you ask for them to be on

No they dont clean them good if u reserve it just main tame it. As for electricity not sure