Looks like you've already found a retreat, but for future reference there is a retreat twice a year put on by a quilt shop called Stitchin Heaven in Mineola, Texas. The retreat is actually at the Brookhaven Retreat Center in Hawkins, Texas. They are held in April and November every year. Their next retreat starts on November 19th (however, most of the time it is held closer to the 10th). These are 4-day retreats (Thursday thru Sunday). The retreat center is on a beautiful lake with lots of cabins and two sewing buildings. My friends and I have gone to both retreats every year for the past three years and always have a great time. Price includes lodging and 3 meals served per day and it's only $295. Here's a link to their website:
https://stitchinheaven.com/quilt_retreat_hideout