A couple of quick comments:
First comment/question: what brand and model of fridge do you have that's running down your battery so quickly?
I have two fridges:
The smaller one I can run a couple of days off my second (house) battery (both my batteries are Odyssey PC1200) along with charging phones.
I haven't used the large Whynter enough to get a feel for it. But I also have a Harbor Freight 100 Watt solar panel kit that I run sometimes.
And just in case I do run my batteries down, this has saved my bacon (and others) more than once!
Buy BEATIT G18 QDSP 2000Amp Peak 12V Portable Car Jump Starter (Up to 8.0L Gas and Diesel) 21000mAh Power Bank with Wireless Charger Car Battery Charger Smart Jumper Cables: Jump Starters - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
I can't say enough about how small, compact, powerful and easy to use it is! The best part is if you do run it down after starting your car, just plug it in while you drive and charge it up again!
Please let us know how that power supply works for you!
My other comment is, personally I love the look of snorkels, but will sometimes have people asking me here in CA (the land of drought) why have it when there's really not anything to ford?
Answer, especially which most people don't realize is that a snorkel is "ram air" pushing more air into your intake. Also, gulping air from near the top of your roof line, you're getting much cooler air than the air coming in just off the road and through the hot grill and engine bay. Cool air will provides a better combustion, thus better fuel efficiency, economy and power.
Okay, don't get me wrong, I'm not saying a snorkel is going let you beat Corvettes in street light races, no it won't. The gains are probably low single digits if that high, but it does help. I was thinking about how my rig is built and I was getting over 18 MPG on our road trip to Maine running through some very hot states. Most people only think of snorkels for stream/water fording, but in reality, we really can't go much deeper than stock because of all our electrical under the hood. So, in short, please be careful with just how deep you wind up crossing. Walk it first with a long stick.