Hi again, B&CM,
Sorry, I didn't realize that you only had the one day on Skye. That being the case, you may want to only take the A832 as far as Achnasheen, then take the A890 down to the A87, so that you can visit Eilean Donan. You have a very busy day planned!
One thing you may want to take into consideration is the weather. Check the weather forecast for Skye before you leave Inverness. I'm assuming that you're taking the Bella Jane out of Elgol. Are you just taking the boat on a round trip basis (staying on the boat), or are you going to do the short tour on land? I'd recommend taking the 90 minute landing and walking about for a bit. Obviously, you won't get to see the entire length of the loch, as it curves off to the left from the landing area. However, if the river is not in spate, you can cross on the stepping stones, and take a short walk up the east bank. The east bank path is well defined; you won't get lost. That will open up a better view of the loch. There's no really good path on the west bank of the loch.
If the weather is bad - windy or lashing down rain, the Bella Jane won't go out. Best thing to do is give them a shout the day before, and then again the morning of your sailing. It's about a 45 minute drive from Broadford to Elgol. I know that the guidebooks say 30 minutes, but it's a single track road with passing places, and there are very few parts of the road where you can exceed 35 m.p.h. Plus you need to find a parking space close to the jetty.
Given that you're planning to visit Eilean Donan (at least 1 1/2 hours if you're taking the tour; 15 minutes if you're just taking exterior photos), the Trotternish Peninsula, and the Talisker Distillery (assuming that you're visiting the distillery, and not the village/beach), you're going to need to have an early start out of Inverness.
Although the scenery is more spectacular in Glen Torridon, there are more things to visit on the Trotternish Peninsula. The road from Portree to Uig is fairly straightforward, but starts to get interesting once you start heading down the hill in to Uig, with the bay opening up to your left. You can take the side road for the Fairy Glen, which is on the right before you head down the hill. After you start up the hill north of Uig, you have the choice of cutting across the peninsula on the unclassified side road for the Quiraing (which provides you with some unique, spectacular views as you approach the "car park"), or you can continue around the peninsula on the A855 and visit Duntulm Castle and Flora MacDonald's monument. You can then see the lower portion of the Quiraing from the road. It's not as spectacular as seeing it from the top.
On your way down to Portree, you can stop at the Old Man of Storr and the Kilt Rock. If you decide to take the hike up to the base of the "Old Man," it's about a two hour round trip.
If you want to avoid driving all the way down to Sligachan, and going back up to Carbost on the A863, there is a side road (B885) out of Portree which cuts across the island to Struan and Bracadale. Again, this is a one lane road with passing places, but mainly used by locals.
Assuming that you haven't already done so, check the closing time at the distillery before you head off around the peninsula. You may want to visit Talisker first. You didn't say when you were traveling, but if it's in mid June to mid July, it won't be getting dark until as late as 10:30, if you're around the solstice.
Best wishes for a wonderful holiday!
p.s.: If you're staying at a B&B in Broadford, be sure to keep them apprised of your arrival time. If it's a hotel, no need to worry. If it's a B&B, you could possibly drop off your luggage on the way through Broadford, to save unloading it late in the evening. Most B&B owners are happy to accommodate.