Hey there,
We bought what I think you are renting! 30 ft Class C, Ford V10. Bought it on Labor Day weekend last year and have had nothing but success with it. Put about 12 000 KM on it and used all of it heavily, considering we're a family of 4.
I agree on the toilet paper thing, and we are also one of those families that don't put chemicals in our toilet, but I think Cruise America provides these chemicals, so it wouldn't really matter if you used them or not, but we don't find them necessary. Go through the "manual" with a fine toothed comb. Make sure when you get to the campground and hook up to electric, that your fridge is now using the electric and not the propane which it has been using while you are driving, or you can use up propane needlessly. I say put the fridge on auto and it will switch, but my husband manually puts it back and forth b/c he doesn't trust it (
). The water heater uses propane also, so only turn it on when you need to have a shower or do dishes (takes about 20 min to fully heat up to enjoyable shower level). The shower is short (!!) just fyi. My husband is 6', and grins and bears it.
Just also know that the sensors telling you when your tanks are full are not always reliable, as they may have something obstructing them or whatever. They are somewhat useful, though. You will get to know by the sound of your flush, or if your shower is not draining (!) whether you are nearing time to empty your tanks or if it's urgent or what. I bet we have the exact same sized tanks, and I think our grey tank fills after about 2 showers and 2 sets of dishes being done. Of course, as mentioned before, drain the black first and then the grey, and take a hose that you don't care about from home and use that to clean out the sewer hose after use or the smell in that compartment can get nasty. Be gentle with the hose, as any leaks or cracks can cause you a world of hurt.
We don't take a tv with us, so I can't comment there. I would take an electric frying pan, as there are only 3 burners and they are relatively close together. The microwave, if it's like mine, is a dream! It's also a convection oven, and I made my husband a birthday cake in there last year! Oh and one thing I couldn't live without is my non-skid fabric that I got from the dollar store (you can buy in rolls). I use it everywhere! Under coffee maker, plates, cans, books... The kitchen seats tend to slide out sometimes and so I even put some under there. Garbage bags, ditto, and a little garbage can, or do what I do sometimes and use a carabiner hanging off the towel rack in front of the stove and hang your bag on that. I also concur about a/c and micro at the same time. Just don't do it.
Hope this helps! We were in Jasper National Park this past weekend (near Banff) and could not BELIEVE the amount of Cruise America and Cruise Canada Class Cs out there! It was astounding! They aren't the fanciest things, but they work for us!
Janina