Totally agree with this. There is nothing wrong with declining a wedding invitation - it is not a court summons.
It would cost a lot for you to get there (unless you could piggyback a Disney trip onto the wedding trip!
). As far as a gift, I would also purchase something from their registry and have it sent directly to them. You can also check
Amazon, Ross-Simons and Macy's if you are looking for a good price on their place settings, etc (or use a 20% off coupon at Bed Bath and Beyond). I have been known to buy a registry item from a store where they are not registered, particularly if it is something they can use multiples of. As far as a gift amount, I'd spend what you would spend for a not-close family member - that would probably vary a lot on this thread.
I would send a gift even if I didn't attend since it is family. I wouldn't necessarily send a gift to a wedding I'm not attending if it was an acquaintance or not very close friend.