Tank Questions
Not sure what you mean by taking care of, there are 2 aspects - dumping and cleaning.
Dumping is fairly straightforward, but finding all the parts you need, or at least want, which work together can be a bit of a challange. Here are the parts of a dumping system: 1) Disposable gloves (safety), 2) clear 45 or 90 degree elbow (conveniance), 3) 2 sections of hose totalling 20 feet or more (required), 4) some form of support so no dips in hose (conveniance) and 5) a good adapter for most of the dump stations out there (required).
For 3, get the heaviest duty stuff you can find and afford. The lighter it is, the sooner it will develop pinhole leaks. For connectors, you can go with the bayonet fittings (you will need at least one to connect to the trailer), but be sure that it fits snugly and securely; there is at least one brand out there (the blue one) which leaks and/or lets loose under usage - not good at all. Once you are connected to the trailer, the blue press fittings are pretty good and versatile, and the blue elbow is the best I've found. The red system seems pretty good too, but it doesn't work well with non-red parts.
Another option which is pricey but conveniant is to install or get a powered macerator pump. There is a water powered macerator, but the first and only time I used it, it clogged up, leaving me in a terrible pickle.
To clean the tank, there are 3 basic methods. 1) stick a wand down the toilet and spray the gunk loose (cheap, annoying to use), 2) have a spray jet installed in the tank (medium price, easy to use, chance of leakage if not intalled right) or 3) backspray through the dump port (variable effectiveness, can get pricey, easy to use, no modifications to RV) For the last one, you replace your clear elbow fitting with one which has a water inlet (AND AN ANTI BACKFLOW DEVICE). One of the choices has a jet which goes back up the dump pipe to knock junk loose and the other has a second valve which allows the tank to be backfilled. I made my own combination of these 2 designs for most effectiveness.