I do not have any firm plans to wild camp anywhere, it is just a contingency. And I will have three liters of capacity on my bike. First attached photo.
My bike tour two years ago, I sort of wild camped, but not that wild and only once. After a couple campgrounds on the map that were no longer there, and two motels that had closed, I pulled into a campground after 9pm, well after dark, the office was closed. The sign said reservations must be made first and I of course did not have a reservation. Set up my tent in a storage area, slept, woke up and started riding before it got light out. Did not even look for water and did not even make coffee first. If I have to, I can do that again.
I am really not too concerned about water.
I have one campsite on my map that only existed on Google Maps. If I go to Loch Ness, the better road for cycling is on the south side, that has few actual campgrounds. So, I was planning on camping there if I go down that road. Google maps listed a campsite. Street view showed a path, and nothing else at the road. On google maps I could click and pull up a photo of the shore. So, I suspect this is a common wild camping spot.
www.google.com/maps/search/campsites/@57.3470003,-4.3800134,14.88z/Second attached is a screen print from my computer showing the path when I had street view enabled in Google Maps. I do not see any shortage of water at the loch. Google told me that Loch Ness is fresh water, water surface well above sea level.
I have bladders I can use, but I am not going to bother bringing them. I use them for backpacking with my filter gravity system. Typically when backpacking, when I make camp, I fill up a 2 liter bladder (dirty one) and start filtering into my second (clean) bladder. While gravity does the filtering for me, I set up my tent. Then I refill my water bottles from the filtered water bladder. Fill the unfiltered bladder again, that is my water supply for water that will be boiled, not filtered while I am at that site. When I pack up in the morning, I usually discard about one liter when I pack.
Two years ago, I did a backpacking segment where I needed eight days of food. Third photo. Bad lighting, sorry, the sun was shining through tree leaves and the food was on a picnic table in a campground. I had just finished six days of backpacking and was resupplying for eight more days. Point being, I have carried a lot of food before, but I have pretty much mapped out a plan for where to buy food on this trip.
But bike touring, I carry heavier stuff, like canned soups, etc. Not all dehydrated stuff like in the photo of my backpacking food.
Fourth photo, I think I had not been to a grocery store for five days at the time of the photo, I still had a couple more weeks of food on the bike. That was on Iceland.
But I do not need to do that on this trip. I marked on my map a couple of grocery stores with reminder to myself that when I leave those stores, I need to have five days of food, that includes contingency for a windy day.
I have five more weeks to finish my planning and packing, I am well ahead of schedule.
Nobody mentioned needing an ETA. I got that done weeks ago.
https://www.gov.uk/etaI will be bringing some food from home, but I reviewed the criteria on what I can't bring into the UK, so it will all be legal, no meat or dairy, etc.
I think all I need to worry about now is jet fuel shortage in mid July for my flight home.