Kelly, Bette and I just transferred residency from MS to TX. You have gotten alot of usful info. We use Escapees as home address and tax/DL personnel very familiar/simpatico with RV'rs in Polk county. If you want to get TX DL you will need to get vehicle/s registered first, inspection of all vehicles done...no emissions test on diesel truck and I believe Harley and RV were each $15 for inspection. If both your names are on title for truck/other motor vehicles, you need to both go to the DL place togther. If rig and truck combined weight over 26,000 pounds, need to take written CDL test (easy) and actual driving test which is not real hard but you have to pass written first to schedule driving test and there was a wait of at least 2 weeks in Livingston...longer other places and test may be harder. They determined my weights by having me bring a picture of GVWR tag on front of RV (mine 18k) and when I registered truck gave then basic dry weight (lot less than actual) and then they added carry weight (in your case 1 ton...2000 lbs) to this weight so, in my case I was 28,600.
There is a ?? $90/95 transfer fee when coming from other state so in my case $270/285 to transfer 3 vehicles and still my total cost of registration was only $650...much less than just the registration on the RV in Miss for 1 year $1400
Lou