Stressing out over guest parking

As a host I believe the parking fees are on me. However as a guest I rather pay my parking than have you pay it and cut open bar.

I would not expect the hosts to pay for my parking. If I did have to pay for parking I would never connect it to the wedding planning or hosting or be at all resentful that it wasn't paid for. I think this isn't a big deal. Just encourage people to carpool or take an uber. I think a lot of people take cabs or uber to events where they will be drinking anyways. Another way to think about it; if you were having everyone over for dinner, would you pay for their parking? Or pay for their cab home?

I would just let the guests know ahead of time and it will be fine

We had a similar situation, and ended up providing a shuttle from the hotel for any hotel guests, and paying for valet for anyone driving him or herself.

It wasn't cheap, but since we picked a venue with parking that had a cost (which we planned to pay the valet parkers, and the parking fee, but it turned out to be a free weekend so we lucked out), we ate the cost. Our guests shouldn't have to feel unsafe, feel like they have to walk a long distance, or feel like they have to pay for a service at our wedding. I believe it is the hosts responsibility

I agree with Rachel. Guests shouldn't have to pay to park at the venue. I would do the shuttle from the gardens. Ask the gardens if they can park overnight if necessary (or at least, til late-night).

Do you and most of your guests live in this city or did you just chose this location? It really depends on the nature of your city. If I attended a friend's wedding in NYC I would probably take a train and subway (so FH and I wouldnt have to worry about not being able to drink), but if we drove I would definitely expect to pay for parking.

I would find a way to cover parking or arrange a shuttle.

What about a shuttle to and from the cheaper lot that is farther away?