Private Ceremony with informal reception later

You could register and only tell people who ask, or not register at all and let people give you money in your cards as a gift instead.

ETA: Don't do a honeymoon fund. The sites take your money.

My fiance & I are basically doing the same thing! Tiny ceremony with about 10 guests (with lunch after) & larger party with friends (approx 50-60 guests) a month later. We created a small registry with honeymoon fund on it (we are using Blueprint, it's free). People can choose to contribute or do whatever they want.. It gives options. I know some people would gripe if we did NOT have any sort of registry. Best of luck!

No honeymoon fund, no asking for cash. Register for a few things, like new sheets or towels to freshen up your bathroom, or some funky cooking stuff you might like.

People will get the hint.

Don't do the honeyfund. Don't ask for money. Either tell your mom you prefer to just not register, or make a small one. Everybody can use new towels or sheets, or a few fun kitchen items (ahem, Instantpot, ahem.)

Please clarify that you are not having a "reception" later. Your wedding reception is whatever you are doing with the 16 guests to the ceremony right after the ceremony.

You're having a party/celebration later with 200 people. It's not a reception, because you're not receiving guests who attended the ceremony. A party in a park with 200 people to celebrate your new marriage sounds great! Lots of people may want to get you gifts, so there's no harm in registering, but make sure that the registry is something they have to ask about, or search themselves. Don't advertise anything about gifts.