This. I had my wedding last year and I don't remember who gave me what but I do remember who was there!!
I remember most and my wedding was 10yrs ago. My mil invited her acquaintance that she ran into on the street after not seeing her for about 5 years. This acquaintance then brought her adult daughter (who we didn't invite) and gifted us $35 for the 2 of them. Our per person cost was $150 and I can assure you she has never been invited to any event of mine ever again.
Along those lines, I have a good friend who seems to always have financial problems (she spends what she has) and she's always welcome to my home and parties so it really comes down to how close you are. Sounds like you have a nice time planned with a bunch of your friends. I'd put away a couple of bucks a day now and just give $100 if that's all I could afford. Or keep an eye out for sales for their registry items. Or you may be able to get the same item elsewhere for less. I was once able to score a tea set that was on the registry for $150 at a different store for $85. Then I called the registry store and said I realized I had forgotten to scan the item when I bought it and could they please mark it as purchased.

I'm sure my grandparents covered their plates! OP, I don't think you should go. You seem not to like this person much, and it sounds like you are going for the experience rather than to wish them well. I have friends from college who I consider my closest friends, even if we only talk a couple time a year (we don't live by each other).
