Destination Wedding 2021 possibly postponed - is it okay to have legal bit done a year before the blessing ceremony?

My wedding is booked in Spain for July 2021, which at the time of booking last year I thought would be no issue. But, now it’s only 6 months away I’m hearing different things and that restrictions there are quite strict, and it won’t be the destination wedding I’ve dreamt of for so long. Before the wedding we have to get legally married in our local registry office anyway and had planned to do this a week before the blessing, or what I like to think as the actual wedding in Spain.
Now we are faced with the decision of so we postpone to next year to ensure we have the wedding of our dreams, or do we ride it out for a bit longer. If we do have to postpone....a part of me just really wants to be married and am considering having the registry office done on the date of our original wedding date this year, with just immediate family and then wait a year for the big ceremony in Spain next summer. Is this a crazy idea to have them a year apart? I think with Covid we just all need a bit of happiness and I think it would be quite cool to have a part 1/part 2 kinda wedding..
But how would guests feel, would they think the same and would they still want to come abroad to celebrate the blessing next year if I’m technically already married? Or do we just keep it a secret for a year and tell no one, so they wouldn’t know any different? Or do we just postpone the whole thing a year and do the two parts within a week but next year.
What are your thoughts? Greatly appreciate any opinions ☺️