Surprising parents with engagement?! Needing ideas Asap!

Hello WeddingWire world!
Me and FH just recently got engaged. This is a big deal in both our families because back home it’s all about getting married the first year you know the person and we’ve waited and waited and have been together for 5 1/2 years now! Constantly getting asked when we’re getting married! We planned our engagement and the ring arrived and were headed on a flight back home in less than 48 hours.

Ive been thinking of just telling them we’re engaged, or just wearing the ring until they notice, but also I’d like to give them a really creative surprise for this moment! (To make up for the fact that my FH didn’t ask my parents for permission because I don’t agree with that way in my personal life) so my excuse and decision is I want to make it a surprise, and a fun one too! Does anyone have personal experience of surprising immediate family or friends that they could share? I’m open to all ideas! I need to be able to pull it off in 1 day though..the ideas I have found on google will either take too long, too expensive, or just not our style. But please share any ideas you have!
thank you for all your input!