To entice Uncle Ed out of his favorite BarcaLounger for the big trip, you have to make it look easy--and, of course, fun. So, let your invitation reflect the spirit of the event. If you're holding the reunion at a dude ranch, for example, send out a "Wanted" poster requesting a relative roundup. Or, make up stationery with a family crest. You might send the invitation from the newest baby in the family (requesting a chance to meet her illustrious kin) or from the oldest relative.

Send out the invitation well in advance and give as many details as you can. Not only will this help your relatives plan, but it also will save you from dozens of phone calls. Here's some helpful information to include.

• When and where the reunion will be held and how to get there. Enclose a map, if necessary.

• What to wear.

• Local airport, bus, train and rental car information.

• Housing options, with phone numbers and prices.

• Information on reunion events and local attractions.

• What to bring (food, slides, baby pictures, water sports equipment, pets and so forth).

• The registration fee, if any.

• An RSVP postcard with a deadline for responses. Leave space for the name of the invitee, his phone number, the number and ages of people in his party and any special considerations he may have.