Hi guys and gals.
Been offered a start doing work for a small local firm carrying Water in tankers for Network rail on a tramping network.
So my question is
What would you suggest having as good equipment to have with you.
My truck will be fitted with an inverter and a fridge.
I’m looking at getting a microwave and an air fryer.
I have a TomTom 6250 to help me navigate around.
Anything else to add to this?
I will try and help, go to a Homebase, B&Q, or a Proper Job shop and buy some big plastic containers, they are great for moving all your kit from the car to the cab.
Tupperware boxes are ideal for medicine, prescriptions and pills, a decent clip board to fill out the paperwork is a good idea too and some Biro pens.
Ask the boss if he or she is using the SNAP parking system where you don’t pay your own money to park up at night, you pull in to a truck stop or motorway services and give the attendant or fuel station staff your number plate and drivers get a meal discount offer.
When out and about in the day driving keep a note of decent places to park up at a later date or ask drivers where they can recommend a place.
With a tanker there’s no worries to be parked in a secure location.
Not having a pop here as I totally understand your excitement/trepidation but I’ll give the same advice as I give everyone who asks; first week take nothing. Second week you’ll know exactly what you need.
It really is that simple. Don’t overthink things.
Also, don’t be a clockwatching lay-by rat. Park in towns, get out, go for a walk, a beer and a home cooked meal (yeah even a Wetherspoons will do).
Wetherspoons app for nights out, and a constant quest to avoid lay bys.
Beat ya to it 
I noticed
If you have an inverter get a smart TV with apps on no need for an aerial use your phone’s WiFi to connect..or an amazon TV stick.
Or failing that a decent sized tablet will do the same job.
Yeah I changed to a tablet after years of tv’s…easier than effin about with aerials.
Got my Sky app from home connected to watch the (neutral) football…(or my own team if I can’t find a Sports bar.)
It sounds mad but if you are in to keeping fit, take some bar bell weights or fit a bicycle behind the cab, failing that remove the front wheel and strap it on the passenger seat, nothing better than getting out of the cab for a ride especially this time of year.
Sleeping bag or a duvet, the TOG factor for the winter and summer, as wisely suggested, don’t cram the cab full of stuff to start with.
Im not really a Tv Lover to be honest so i think ill stick to the IPad for now.
Wet wipes are handy in case of not having access to a shower, and a pee bottle for the night to save getting dressed to get out of the cab for a pee.
Before buying a microwave or air fryer, make sure the inverter can handle it. i.e. check the wattage required against the inverter output,
A small camping gas cooker is ideal if stuck somewhere with no access to get a hot meal, a few tins of soup, or noodles to knock up a meal, tins of potatoes or meat.
Welcome @Danovleeds and I really hope you get well setup from all the above but I have to say, as a long retired old timer, that it has left me wide eyed and gobsmacked. 
Back in the '70s I had the revolutionary idea to take a portable tv on a trip to Italy. Parked outside Concorrezzo customs for the weekend I discovered that it only got a signal in the middle of the cab space, so I hung it from the roof hatch handle on a bungee strap and watched while lying on the upper bunk. All I got was a very grainy picture in a language I couldn’t understand. I put the space it occupied to better use on the next trip, nothing missed.
Some Snooper HGV sat navs have an inbuilt tv.