We live in a very small town/large village and even here, if (big IF) my children were to visit each Santa's grotto/party that is on offer in the place we live, they would see the big man himself over 10 times! I manage to tactfully avoid most of them - not because I don't want to support the particular group or charity that is providing the Santa experience, just because more than a couple of times is too many!
They also vary in, let's say, authenticity. One particular Santa is pretty good and sees the children in two different grottos. He cleverly remembers them by name (small town syndrome!) so that he can check if they have been keeping their promises of bring well-behaved, tidying their bedroom, etc, etc.
My children have known for a couple of years that the Santa that we visit in our town are actually Santa's helpers. They cottoned on pretty quickly that they look slightly different at each visit and so the truth was told! Father Christmas does exist and lives happily in Lapland with assistants employed all over the world to help collect messages to send to Santa and distribute presents to the children.
Although... they do believe the Santa at Portmeirion Village is the REAL one, namely for 2 reasons - he has a real beard and can speak Welsh! Our first language at home is English but my children are taught through the medium of Welsh and so are fluent Welsh speakers, so only the real Santa would know that they could speak Welsh, right? That's a good enough reason for me!
Although... they do believe the Santa at Portmeirion Village is the REAL one, namely for 2 reasons - he has a real beard and can speak Welsh! Our first language at home is English but my children are taught through the medium of Welsh and so are fluent Welsh speakers, so only the real Santa would know that they could speak Welsh, right? That's a good enough reason for me!
This year, we didn't manage to visit the Christmas markets at Portmeirion, but if you are ever near there on the first weekend in December, it's well worth a visit!
So anyway, when you're planning your December fun and festivities, take care not to have a 'Santa Overload'! It can be more magical keeping somethings under wraps...