Welcome to East Texas! February and March can have some delightful weather, but there is also the chance of a sudden "Norther" which can drop the temperature by 30 degrees in just a few hours. Still I emphasize that we can have days of shirtsleeve weather in February and even more such days in March.
If you had the choice, of course, April would be the very best time in East Texas with blooming wildflowers, azaleas, and daffodils.
In February and March we just have to take the days as they come and be prepared for changes in the weather. We can have freezing weather on some nights. We have snow about once every three or four years. More likely in January, but it could come in February. It is certainly not an annual event.
Now for small towns and fishing I will start with Jefferson, Texas, an old riverport that was left high and dry with the opening up of the Red River below Caddo Lake. That means there are many old home and business structures have been preserved as they were just before and after the Civil War. Nearby is Lake o' the Pines which has several really nice campgrounds operated by the Corps of Engineers (COE). There is a unique state park not far away, Caddo Lake State Park which has good campsites and boat docks and rentals. Not far north there is Lake Wright Patman with COE and state park campgrounds.
Here is the problem,
offer WiFi,
. Most of our state parks do have WIFI but it is not the fastest, especially when many people are online at the same time. I do not think COE parks have WIFI at all. It is a shame, but the parks that meet all your other desires are the ones least likely to have really good WIFI.
But let me go on. Tyler State Park is one of our favorites and is near many small towns as well as the nearest thing we have to a city in East Texas--and a fine city at that, Tyler. There are many commercial campgrounds around Tyler that would have WIFI, but none as desirable as Tyler State Park.
There is Bob Sandlin State Park near Mount Pleasant and Pittsburg, both the kind of small towns you might like. There are commercial campgrounds in Mount Pleasant and Texarkana that would have WIFI.
A bit further south is Lake Sam Rayburn. I am not as familiar with this area as I am with the towns and parks I have mentioned above, but I know by reports that there are good campgrounds around Sam Rayburn which is near the towns of Nacogdoches and Lufkin.
Maybe this is enough for one post, but I can give you very specific information about almost any question about East Texas and especially Northeast Texas. You can send me a PM and I will be delighted to respond.