For your shits and giggles, as you say, on your loop from Dollar, if you aren’t planning it already, after you hit SG, make sure you drop down into the Tarn and hit Dragon’s Head and Big Horn–way worth while, despite the grind back up from the Tarn to Sky High Trail. If you really want to add to your loop. Hit Lake Peak, swoop down to FC saddle and up to Grinnel. Then follow Grinnel Ridge down to (what used to be) the trail back to lower South Fork, and out. Lake Peak right now is worth the price of admission just to get to walk through the “creepy forest” of torched limber pine in white sand.
Your only issue, besides being tired, will be water.