Unless the traveler wants to be first on the scene, it might be wise to put off a visit to Epcot Center in Orlando for a few months--until the mechanical difficulties have been corrected and at least one more major Future World pavilion, Journey Into Imagination, opens Dec. 1. Horizons, featuring a look at family life in the 21st century, debuts in 1983, and The Living Sea in 1984. More restaurants and shops will be opened later this fall.

Current Epcot admission fees are $15 for adults, $14 for youths 12 to 17, and $12 for children 3 to ll. Three-day passes good at either Epcot or Disney World (plus Monorail transfers) are $35, $33 and $28 for the three age groupings. Four-day passes: $45, $42, $36.

In the off-season, Disney World operates between 9 a.m. and 6 or 7 p.m. Epcot is expected to be open from 9 a.m. to 9 or 10 p.m. daily, with longer hours at peak season. Two full days should be sufficient to see all the Epcot attractions.

Airfare varies by the week. A recent visitor paid $186 for a round-trip ticket from Washington to Orlando while her seat partner was charged $270 for the same flights. Keep an eye on the ads for bargain rates. Hotels and motels in Orlando are numerous and the rates vary widely. Contemporary Resort, a Disney hotel through which the Monorail passes, charges $105 a night for a double. Check for Orlando travel packages being developed, among them Arthur Frommer's Travel 2000 offer: a week's hotel lodging and round-trip airfare on charter flights from 30 U.S. and Canadian cities for $199 per person; $149 for children.

Epcot has been billed as an adult theme park, but school-aged children might find Future World more thrilling than their parents do. On the other hand, the fairly good restaurants (by Disney food standards), the beer garden, the English pub and the bustling night scene should lure the adults.

Wear comfortable walking shoes. Epcot is considerably more spread out than Disneyland or Disney World.