Outdoor living is acquiring more and more indoor accouterments. Among the luxurious or merely practical innovations that are available to vacationers this season:
>The trailer subculture has evolved a bullet-shaped camper that is bidding to become the Cadillac of recreational vehicles. The air-conditioned, 25-ft.-long Discoverer, built by Detroit's Rectrans Inc., sells for $16,000, features a pile-carpeted living room with built-in television and stereo, a wood-paneled bedroom and a bathroom complete with toilet, shower, sink, closet and medicine chest. The kitchen boasts a refrigerator-freezer, stove, roomy cabinets and sink. So far, a swimming...