From near Smith Morehouse:
Fish Lake - It's about 6 miles in, and low usage, but a great lake. Caught tons of fish there.

From the Crystal Lake trailhead, favorite spots:
Wall Lake - Wall is a short hike in, so easy to do with kids. You'll also get more people, so you have to weigh that.
Island Lake - about 4.5 miles in, and you pass a few lakes getting there, but worth passing them for the payoff, IMO. Good fishing, and lots of nice camping spots--the one right on the cliff's edge is awesome, if you can get it. Easy day hike to Big Elk Lake for some variety.

Grandaddy Basin:

- posted about this elsewhere in the thread, but mentioning again because there are so many lakes in a close area. I've always gone in from the Hades Trailhead, and it's a relatively easy hike. Look at the map and pick your lake. Be careful about campsites, though, because rangers patrol this area and you will get a ticket for not following the rules about proximity to lakes and number in your party.

Brown Duck Basin:
- Also posted elsewhere. Long, steep climb in, but nice payoff. Good fishing at Brown Duck and in the stream.

Miscellaneous:
- Twin Lakes - There are lots of "Twin Lakes" around, but this one is roughly between Paradise Reservoir and Marsh Peak. It was a bumpy road getting in, but once parked, it was about a 4+ mile hike in. Nobody was there. There was a nice spring to get water (we filtered anyway), fun fishing, and great places to explore.

- Not as many people explore the North Slope of the Uintas. Go into Wyoming, then find some forest roads to drive in on. You can explore by vehicle, and find a lake that looks interesting, and check it out. I haven't fished there, only camped and explored, but it ought to be great. We went in near Fort Bridger, heading down to Lone Tree, then just headed out on a forest road.