I found the TRT plenty interesting, though I had end-of-October weather and solitude to flavor it. [summary here] It is certainly more subtle/less jaw-dropping than other spots in the Sierra, but I don't think that's a reason not to go. If your "summer" is flexible enough, I'd recommend pushing towards fall for slightly less traffic on the trails, though this will make it drier too. I'll bet it gets pretty darn hot and crowded in the summer. I'm not familiar with typical meltout patterns for the area in the early season, but pushing the snow would be a good way to ensure no water worries and probably a little less company...
Transportation and off-trail logistics
I recommend Reno if you're flying in and want to avoid a rental car.
My trip was planned because I was attending a conference in Reno. (On a grad student budget, conference = free travel = make sure to go backpacking nearby!) This also had the advantage of being able to send conference clothes/laptop home with a fellow student so I didn't have to worry about storing anything while on the trail.
There's an REI in Reno in walking distance of the airport. I picked up fuel and a firesteel (unsure of how TSA would like that) there. Actually, after my trip, with the firesteel unused, I returned and, with time to kill, found a nice deal on a clean shirt for the flight home. :)
I rode the South Tahoe Express from the Reno airport to South Lake Tahoe ($26 one-way about a year ago). Alternatively, there was at the time (and probably still is) a way to do public transit from Reno to SLT (and even up to the trail at Kingsbury) for something like $6 one-way. The timing with the end of my conference was going to be tight for that, so I "splurged" on the shuttle.
Pick up your fire permits and Desolation Wilderness permits from the USFS office in SLT. From there you can get a local shuttle service to the trailhead at Echo Summit or Echo Lakes (after trying for about an hour to hitch, I used ShuttleIt! Can't remember the guy's name, but he showed up in about 15min(!) and charged me $20). You can also shuttle to other locations from there. The USFS office can recommend shuttles or taxis -- they seem to know who's expensive and who's not.
On my way back, I managed to hitch down to SLT from Echo Summit (2 rides, both within minutes). From there, I took the STExpress back to the airport. While in SLT, I spent the night at Motel 6 both directions (inexpensive and clean).
North and east sides are pretty dry, but the guides make that clear.
The one water thing not reflected in the TRT website info when I hiked was that the Marlette Peak campground (right on trail) had recently been overhauled and included a nice hand-pump well with potable water just down a slight hill from the campsite. This means you don't have to detour down toward Marlette Lake for water.
For my hike, long dry sections (tempered by a giant storm my first 3 days out, when I was fording thigh deep streams not on the map) were: near Brockway to a couple miles W of Tahoe Meadows. Stream crossing at Tahoe Meadows to Marlette Peak Campground (Twin Lakes dry). Marlette Peak campground to stream a few miles S of Kingsbury (detoured .5mi one-way to Spooner Lake and also filled up on water at Tramway Market (nice guy), where I had send a food drop).
In addition to what's mentioned in the thread so far, I found pmags' TRT info very useful when planning.
I made up and carried this guide for my trip. No guarantees that it's not out of date. (Print 2 pages per side)
Hope you have a great hike.