Canodros. Canodros operates the all-exterior-suite 293-foot M/V Galápagos Explorer II, with 50 cabins, each with twin beds that can be converted to a king-size bed, and a swimming pool and piano bar. You definitely won't feel as if you're roughing it. 04/228–5711; 800/327–9854; www.canodros.com.
Ecoventura. Ecoventura operates two 16- to 20-passenger yachts, the M/Y Eric and M/Y Sky Dancer, which it uses on weeklong cruises through the islands. 04/220–7177; 800/633–7972; www.ecoventura.com.
Enchanted Expeditions. Enchanted Expeditions—frequently referred to by its former name, Angermeyer's—operates the M/Y Cachalote I and the M/Y Beluga, both 96-foot schooners that hold 16 passengers for cruises through the islands. 02/256–9960; 800/327–3573; www.enchantedexpeditions.com.
Galápagos Galasam Tours. Galápagos Galasam Tours operates eight yachts holding 10–16 passengers. Its catamaran Millennium, is an 82-foot cruiser that carries diving gear on board. 04/230–6093; www.galasam-tours.com.
Kleintours. Kleintours operates the 300-foot M/V Galápagos Legend, which holds 110 passengers and has cabins all with ocean views. Kleintours also operates two yachts, the 26-passenger M/Y Coral and the 20-passenger M/Y Coral II. Cruises on the yachts last three, five, or eight days. 02/226–7000; 888/505–5346; www.kleintours.com.
Metropolitan Touring. If you're traveling with kids, Metropolitan Touring's largest ship, the 90-passenger Santa Cruz II, built specifically for the Galapagos, is a good option. While most of its guests are couples, especially during school breaks, there are generally a handful of families with children. There are games and movies on board, and in addition to excursions, kid-friendly activities are held daily. Of the two yachts, La Pinta accommodates 48 passengers and the Isabela II just 40. For a fee, all three ships have satellite Wi-Fi. 02/2298–8312; 800/527–0166; www.metropolitan-touring.com.
Quasar Naútica. Quasar Naútica has well-maintained yachts, including the three-masted, ketch-rigged schooner Alta. Its most luxurious and fastest yacht is the Parranda. 02/244–6996; 800/247–2925; www.quasarnauticausa.com.
TOPPSA. TOPPSA is a last-minute booking agency. Its fares are reasonable. 02/224–1345; 866/809–3145; www.toppsa.com.