99.9% of the issues with the black tank is due to owner neglect or owner lack of knowledge, which this thread shows. Chemicals will help mask odors but also assist in breaking down solids. Yes water is the key, and, not dumping till it is near full or upon leaving the campground. Using paper designed for RV's not septic tanks, is also a help in keeping the system in good working order. Proper maintenance will go a long way. As others have said, using your own toilet, for ALL purposes is one of the joys of having a TT. When we work kamp were at a site for 6 months or more, never had an issue but, we use proper technics. No reason to not use your RV toilet. Wipes are the bane of the sewage industry with cities asking people to NOT flush them down as they never break down. You can google pictures of sewage treatment plants inundated with wipes, costing huge bucks to take care of. Never throw Q tips, feminine products or anything else other than TP and personal waste.
Enjoy your RV, spend a few hours looking on the internet including here on the Jayco forums, as to proper maintenance of your RV.