If you plan to head west on I-10 in April these are some ideas based on many trips from Florida to East Texas. First of all if you plan you trip with a possible stop in the panhandle area of Florida you will find there some of the best beaches in the entire country--even in the entire world. Coming from the east, I am referring to the area from Panama City, FL (St. Andrews State Park) all the way to Pensacola (Fort Pickens Campground in the National Seashore). I will mention also Topsail Hill State Park near Destin with those same beautiful beaches.
In Louisiana you will be passing through the "Cajun" area of South Louisiana. If you do not want to visit New Orleans specifically, use I-12 when it branches off from I-10 near Slidel, LA. Just off I-12 there are Fountainbleau State Park and Fairview Riverside State Park.
In April the bluebonnets will be in bloom in the Texas Hill Country. Take any route toward Fredericksburg and allow time to drive the Willow City Loop (at least a full day). Not every year will be a "banner year" but always there will be bluebonnets. A nice visit to Kerrville is also possible. There is a "Western Art" museum worth a visit. Many more possibilities in the Texas Hill country. An alternative route through Louisiana and Texas is I-20 through Jackson, MS, Vicksburg, MS, Shreveport, LA, Tyler, TX, and on to Dallas. I live 25 miles north of I-20 as it passes through Longview, TX. We have Caddo Lake State Park, Tyler State Park, and COE campgrounds on Lake 'o The Pines. All just off I-20. As for Dallas/Ft. Worth, the good news is that I-20 is an easy bypass unless there is a traffic accident (which I have never encountered). I have been able to tow an RV trailer at highway speed on I-20 around Dallas and Fort Worth without any problem. (No guarantee, but that is my experience) The weather along I-10 and I-20 in April would ordinarily be ideal, avoiding the high humidity and temperature that will begin in May, but weather can be very different from day to day and year to year.
Maybe this is enough for now. If you have any questions about this part of your trip I will be glad to respond to a personal message. I have stayed in many of the campgrounds along I-10 and I-20 that I have not mentioned here.
Post above in response to OP.
