It's not the equipment so much as knowing what to do. I found doing sports and events that it takes developing skills and getting in a lot of practice. This is sort of like cramming for a test, and maybe your instinct to not do this was trying to tell you something. But if you're going to do this...
An important thing I learned years ago from a pro (and have read elsewhere from other pros) is - GO EARLY. If you can, go to a venue ahead of time. And/or go as early as possible the day of. Figure out where would be some good vantage points. Find out where things will be set up, if there are any particular happenings or specific people that you'll need to get. Take shots of the buffet, the tables/decorations, before people start to eat.
Then probably get shots of people enjoying themselves at dinner, where you need to try to be aware of positioning (yours, to capture them so you can see individual people in the group, nobody behind someone else, etc. or try another angle and get more than one shot to make sure to get everyone). Try to catch them laughing & talking more than a weird face eating. Will there be backyard games to shoot too? maybe before or after dinner? Figure out ahead of time where to shoot from for each thing that will be happening.
Shooting sports and events can also mean a certain amount of thinking on the fly and reacting quickly. Which is why a lot of practice and knowing what to do can enable you to be successful. But it can help at least to know what will be happening where, so you can anticipate what's coming next.
If this will go into evening I'd get everything (the photos) you need early before you start losing light. If this goes after dark and they set up lights it might still be low light so I'd be prepared for that.
I usually use a short telephoto or a 50mm, depends on the size of the place. I like to get in close enough without needing to actually have to move in too much because I'd rather shoot without people noticing me too much. Except for shots that people like to wave or ham it up for the camera! lol those can make for fun photos too. I wouldn't like the distortion of a wide angle myself and guess I haven't shot where I need a wide view.
And someone on Facebook offered to loan you equipment?? I don't know... depends on how well you know the person I guess since that would make you responsible for it. And doesn't
Adorama or maybe
B&H rent equipment that they'll ship?
From looking at your page you seem to be seeing good photos but the exposures seem to vary. It looks like you'd benefit from learning to get proper exposures on a consistent basis before you get any further into trying to do this as more than taking photos for yourself. I'd try to get in a lot more practice with just you and your camera (or with friends/family members) before you're doing more photos for other people.