If you want to do that, that’s fine. As long as you keep the poundages reasonable, like walrus training.
However! I’d rather just do 3 or 4 movements for 50-100 reps. Or use the sandbags after your main work for assistance. Dips/pushups, sandbag row/chinups and sandbag goodmornings/split squats/bear hug squats/sandbag squats you’ll be golden!