We have blackbuck hunts available all over Texas. Check us out at Texas Elite Outfitters or feel free to PM me for more info. Be glad to get you fixed up.
If these guys can't help you I have a ranch in Stonewall that touches LBJ state park you will see 50-60 blackbuck a day and one in every ten are shooters starting at 1250 up to 1850'$ I can't offer lodging but you will see several big males in a day. Good luck on your hunt