Destination Wedding Gifts????

Depends on what you mean by DW, traveling to a island or overseas. I would not, they are already spending a TON on your wedding. IMO their gift is their attendance.

I doubt anyone attending would buy and bring a gift. If they give anything, it would be a check/cash which would be a lot easier to travel with.

Is anyone hosting a shower for you? If so, then I would create a small registry with less expensive items. Other than that, people tend to give cash anyhow if they are gifting the couple, so I wouldn't worry about it. I would also not expect people who are spending big money to attend your wedding to also give a gift.

In my circle no one really brings physical gifts to the wedding. They either bring cash/check or send a gift to the couple's home. I would think people would understand you aren't bringing loads of extra suitcases to your wedding but I would try to leave room. Worst-case scenario you buy an extra suitcase and pay for an extra bag. I would make a small registry and expect mostly cards (and smaller gifts in general as people are likely to give less if they are traveling - as PPs have said).

FH's family all live in FL and we live in MA, and this weekend FMIL told us that people were asking about us being registered. We are not and she was a little confused by this and kept asking us questions and insisting that some people wanted to buy us gifts. We are not going to register, but maybe you could make a small registry so the option is there?

Not necessarily. The proper etiquette is that gifts should never be brought to the wedding, but delivered before or after.

Etiquette would say yes you can register for gifts but only expect them from those you invite to the wedding (which is usually a smaller crowd with a DW). We are having a DW in Mexico and did not register for gifts and have asked for anyone wanting to make a gift to make a donation to our favorite charities or one of their choice. I really don't want anyone spending more money on us if they are making the trip with us! That said, I know a few people will insist on gifts and have just told my mom and FMIL a few ideas they can suggest when asked. For the timing to register, I think once you have a date and save the dates are going out and/or you have parties or showers planned, you need to have the registry in place (so probably at least 6 months out). You can always add to or change it later!