If you must hike only ONE SECTION of the PCT, then this one stretch, LE CONTE to LAKE TAHOE, is by far the best for high altitude, granite, peaks, passes, total alpine lake bliss, with incredible mountain scenery. When you must limit your big adventure trek, due to time constraints, this portion is some of the most beautiful high elevation terrain in the whole darn nation. Seriously. Better than a movie!
Services like grocery, laundromats, hotels, restaurants, post office, available in SLT (South Lake Tahoe). Postal, food & lodging can be had in numerous locations along certain high country routes – like Vermillion Resort @ Lake Edison. The PCT guide books give good descriptions of these handy trailheads with services, in way more detail.