The boat cost is $50 one way for up to six + gear. You must hike the mile down from the parking lot to the lake where they pick you up. Approximately 40 min. boat trip up to Desolation/Little Beaver area. Much shorter to Big Beaver and maybe cheaper, I don't know. Balance that against the 10-15 miles or more of slog up lake plus extra food. A $$ vs. time thing. I've done the slog east and west side several times each. Next time it's the boat, probably later this month. The drive around to the north end is much longer and boat launch can be a pain if the lake is low. I do know that some people do the portage down to the launch site at the south end.