I think you can TOTALLY bring their gifts with you, who doesn't like a gift?? And I think you can do it quietly to not distract from the engaged couple. 

I need a report back about what happened. 

I think give the gift. Get it out of your hair, especially since who knows what variant will keep us from seeing each other in the near future. And now you know: just ship the gift next time!

Depends on the gift. Chances are time has passed enough that they really don't care that you forgot, so if the gift is good, just keep it! 

I would def keep if it's alc. But a candle? Or hand soap? I think the social clout you will get from giving the gift will outweigh its use. 

Is the  party in a public place, where said gift could theoretically be stolen? Or is it at someone's home?

Also, are the gifts something they could wear on their person, or is it something with an odd shape and/or large weight?

The answers to all of these questions make a difference:

There are other factors too, these are just top of mind. 

I am going to an engagement party tonight. At the engagement party, two of my very dear friends will be. It was their bdays in NOVEMBER and I left their gifts at home when they had a joint dinner together (ugh) which I didn't realize until I was already in the uber. 

Is it ANNOYING or inconvenient for me to bring their gifts to this party? Like, IDK if i'd personally wanna be responsible for now having to watch a little gift bag just because my friend is forgetful? (I have something for the engaged couple too so that part isn't weird) But it's also been about 84 years since their bdays so i feel like i need to just get rid of these gifts. ¯\_(ツ)_/¯

Do I bring a gift?