scatman
you wanna see it all huh. i've done most of the trails you've got there, except for the south half. i haven't been much south past elk lake or ardeth lake. the only hike i ever did from the boise river side was up the little queens river, which is off your route.
i've struggled a lot with figuring out a good long loop in the sawtooths. i still don't have a great solution.
any way, if you want to know what i think. i think that hiking from grandjean over to sawtooth lake is worth it. and as you said you've never been, i think that you should see sawtooth and alpine lakes. they're good. there are good views of the interior of the range from above north fork baron creek, and baron lakes and alpine lake are nice. i've never seen redfish lake from the inlet, but i'd be interested to. you're less likely to see any one between redfish lake and hellroaring than probably any where else you're looking at there. it's a nice quiet section with some views across the salmon river valley to the white clouds. hellroaring lake is nice, and i think imogene is exceptional. the passes south of imogene are nice, particularly the one farther south. the bigger southern lakes, like vernon and edna, are nice, but not as nice as i would've hoped. like i said, i can't tell you any thing really about the southern section. the south fork payette river trail is long, like
Bob said, but elk lake was mildly interesting. and i hiked all the way from elk lake back to grandjean in just a few hours the time that i was there, so it's not like it's a big deal.
all that being said, i think the best parts of the sawtooths in my opinion are the cramer and hidden lakes area, and the toxaway, twin and alices lakes. which i imagine doesn't make planning your trip any easier. i would highly advise not missing those bits, but have a hard time advising you how to incorporate them into some thing that includes the other sections you'd want to see. my experience at the head of goat creeks drainage, around warbonnet and feather lakes was also on par with those areas, but it is slightly off trail. close favorites after those would be imogene lake, the divide between baron and alpine lakes, and the divide between edith and edna lakes.
if you haven't, and would like to, check out this.
South Fork Payette River, june
it covers a little of what you're looking at also. i went in june, so i didn't go far, the river was too high at the crossing, and there was nothing but snow on the other side of it any way.