Television: Bought an RCA on line from Amazon.com. It's a 13" flat screen, is 12V or 110 (we do a lot of boon docking so prefer to run off the battery). They have larger screens, but they use many more amps and would drain the batteries too quick. Our solar panel charges the batteries so don't need to run a noisy generator.
Best option is to buy a 12v TV that also works on 110 so you have the option if you're connected to shore power. That's what I use and it uses minimal battery power. It was an RCA and I found it on line at Amazon.com for around $200. The smaller the screen, the less power usage, so depends on your battery set up.
We notice a difference in diesel mileage traveling from Michigan to Florida in december and then again Florida back to Michigan in April. We figure most of it is due to temperature change and the diesel engine running better in warmer climate. Might be a factor for you?
I bought some 2'long wind twirleys that we hang from each corner of the slide at a flea market. Even if you're walking with your head down, because they're 2' long, you see the twirleys before your head connects with the corners. We clamp them on with a small plastic clamp and have fishing swivels between the clamp and string for the twirleys so they don't twist up when the wind blows. Just make sure you put them on after you put the slide out or you'll konk your head again.
We have a 2006 Chevy 3500 4x4 diesel. We pull a Sunnybrook 32' with 3 slides for winter trips to Florida that weights in close to 15,000 lbs. We also have a 1997 Bigfoot 9.5' Pickup Camper for shorter trips after we're home from Florida. This is the second pickup camper we've owned through the years. As we have a 3500 that we ordered with the camper options and it's a 4x4, the truck bed is slightly higher which makes for a little more of a top heavy load, but the 3500 seems to do a good job of hauling it. Our mileage towing the 5er is 11.5 to 13.5 mpg and traveling with the camper is 17.5 mpg approx. There is a little more sway turning corners with the camper than without it, but the overall ride is basically the same as with the 5er. We have talked about and considered putting overload springs on, to help with the cornering, but don't feel it's an absolute necessity. According to the sticker on the camper, its weight is 1500 lbs (which might not be exactly accurate) and with it loaded with supplies, food, water, propane, it's probably closer to 2,000 lbs. As far as the truck noticing it less back there, I think the tongue weight on our 5er along with other items we haul back there is probably real close to the weight of the camper and doesn't seem to make much difference. We like the easy and quick traveling with the camper vs. all the prior prep to moving the 5er when making several overnight stops and sight seeing in a 1 to 3 week excursion. Also, if you can park your truck camper vehicle in a space, you can park it, whereas the 5er requires different tactics for parking space and many stops can't be made due to no parking to hold the length of the truck/5er combo. Every camping option has it's pros and cons.
Years ago, our favorite dog, a German Shorthair Pointer named Mike with a big personalty died at 13.5 years old. We got him as a small puppy that you could hold in one hand and when grown he had enough energy to tire out 6 kids. It was sad to watch him grow old and slowly more feeble, lose his hearing and partial eyesite, and his exceptional personalty dim with age. I cried for 3 days, and after 20 years we still miss him greatly. My condolences for your loss.