I know a reliable China travel agency, Travel China Guide, which may provide golf tour in Chengdu. You may check the following website to find more information about this tour and try to contact with this travel agency through this website: https://www.travelchinaguide.com/tour/golf/chengdu/ .
The best travelling method by land from Chengdu to Chongqing is to take bullet train between them, vice versa.