Both Amistad and Ivie are great lakes to kayak and fish.
My favorites on Amistad when the water is good...
277 North. Has a campground and not too many boats since it's a little shallower than the rest of the lake.
Rough Canyon Boat Ramp. Also a campground, but spring will probably be a more heavy use area for boats. But man, what an awesome place.
Pecos River Ramp. By far my favorite. Big boats really can't get down there. It's about 30 miles west of Del Rio, but worth the drive.
www.yakangler.com/fishing-location/524-pecos-river-boat-ramp
Here was a trip from this past year. You can see the area around the boat ramp. Lots of great fishing spots.
www.yakangler.com/forum/16-fresh-water-kayak-fishing/32479-dude-s-trip-2016-pecos-river-pt-1#133732
And here is a trip report from a few years ago, but the water is about the same this year so I thought that might help get a look at what's down there.
www.flyrivermedia.com/pecos-river-adventure-2013/
I haven't been to Lake Ivie in a while, but we usually drop in at Concho Park Marina. We haven't had any trouble with big boats, but it's been low the last few years and smaller area until you get into more open water. But in a PA14, no big deal at all. One thing as of late is, Ivie has been a tough lake to fish. Have heard nothing but lame reports lately, may change by spring hopefully.
One lake that's on fire lately is Lake Spence near Robert Lee. I haven't kayaked it since it filled back up years ago, but all the reports have been awesome. We're hoping to go out there this month, so i'll have more info later on drop in spots.
Hope this help some.
Scott