Hello from McMinnville, OR
It's 17 cents/kwh plus a $2 reading fee and I spent $127.70 from Dec 5th - April 2. I spoke to residents with much Class A's & they said an $80 electric bill wasn't uncommon. I ran my fridge and microwave everyday but only used my A/C for a few hours the entire time I was there. With your solar setup your bill should be minimal.
They have full hookup pull-thrus but they're normally only used for one or two nights. I have PP America and was only going to stay for 2 nights at $20 / night but after finding out a back in spot with a large patio & a parking space on the other side was only $250 I jumped on it. You get a mailbox and UPS/FedEx will deliver right to your door in you include the space number in your address. Clean showers (only used mine) decent size laundry room & it's $3 for a wash/dry load. Go in the middle of the week, first thing or last thing in the evening. Sat & Sun mid-days the laundry is usually busy.
The well water is nasty (it's OK for showers) but they have a reverse osmosis machine at the clubhouse & you can fill containers for free. There's a brand new travel center right on I-8 & that butts against the park but it wasn't completed when I left and it'll be more convenient for propane vs a 25 mile r/t to the nearest town. Yuma is 40 miles West so double that for a grocery shopping trip. Trains run continuously about 1/3rd mile away but it's extremely (!) rare they blow their horn. If you're a real light sleep it might bother you but I got accustomed to it quickly.
Monthly price will be $265 in 2019/2020 but it's a very nice park even if there isn't much shade. Mention my name & get 10% off the first month. I get squat.
Tacna has a Chevron mini-mart & the gas was normally 20 - 25 cents less than the Chevron 12 miles away in a larger town. where it's currently $3.69. Cheapest regular in Yuma is currently $2.97 it's & $2.87 for diesel.
It's currently 112 degrees at 1:30 today (12th) and if you'd like more info just cut & past the URL. https://coppermountainrvpark.com/
I'll be there in mid-late November unless I get a temporary job with the US Census Bureau. It appears there'll be an office here in Mac & the initial online questionnaire routed me to a Supervisor application so if I have the chance I'll take the job. It's $17.50 / hr so that'd help me make even more mods to my truck and/or trailer.