CGeorge, DSDP has many good suggestions and practices that I follow too. Learning from my black and red fiberglass boating days I try not to spend money on products promoted for the RV Industry. I buy what ever wash n wax product I can find on sale with good results. It doesn't matter if its Blue Coral, Turtle Wax, Meguiar's etc., they all do a nice job, buy on sale! I also like DSDP's suggestion of the micro fiber mop washer. I am going to trade my brush in for one to use on my extension pole with water. NuFinish worked in the sun and water of my boat, that's what I use on the motor home, $9-$10 a bottle vs. products costing five times that some may propose. I don't use any "black" streak remover products. Wax on a rag takes them right off and re-waxing at the same time. Another believer here of waxing the front end as often as possible to help with bug splatter. Almost before every trip out of the driveway, always clean, never dirty, I'll spray dollar store furniture wax or use a spray auto wax found on sale on the front end. Makes a big difference getting the bugs off. If there is a problem, wet dryer sheets works fantastic with out stripping wax off. As others have posted, 303 Protectant works incredibility well on fiberglass (my go to spray on cleaner/wax to keep my boat from fading in the summer sun)your tires and UV protection, inside the rig on the dash, vinyl, plastic and leather. For heavy duty cleaning needs like pre-season or after an extended road trip Super Clean by Castrol (Oil) in the purple gallon jug is a must have around my garage and laundry room. Works great on greasy stains from butter and cooking oils on clothing. Various dilutions as direct for surface to be cleaned. I use it to clean my awning and fiberglass roof. Also, I will coat my roof after it is cleaned with Mop-N-Glo. There are again more expensive products out there, but two coats of it will do the job for a season easily.
Good Luck with the brand new rig!