I think that in several of the pastures you would have enough shade but in those longer and bigger pastures you probably would need more shade in the summer.
I am going to say that you should probably make the pastures more equal in size and go with more pastures for a couple of reasons. One is that if the pastures are more equal in size then you can get a better idea of how quickly the animals are grazing down the pasture and when to move them. IF that pastures aren't the same size then it will be much harder to figure out when the pastures are grazed down enough. If one pasture is bigger than another then you won't be able to move the animals as soon
and this could expose them to more worm load. Then you would need to worm the animals and have to handle the animals which creates more stress on the animals and more stress on you. You may not want to have both sheep and goats. Sheep and goats share parasites so it will be harder to rest a paddock long enough to break a parasite cycle even if you graze horses and and pigs directly after the sheep or the goats.
I went to the effort to permanently
fence 8 pastures for rotational grazing for our horses,
cattle and goats. Have about 18 acres in rotational grazing. I used high tensile with six strands every other one hot and the negative wires grounded in each paddock. Some goat
fence woven wire and some cattle panels. Had to use the cattle panels to be able to fence in my fence rows without cutting down all the trees and bushes that the goats love to eat. On the last pasture I just finished fencing, I used some chain link and plastic pallets and
wood pallets. I got all the pallets for free. The pallets are about 300 feet of fence line on the permanent winter goat pasture area and that makes pasture number 8.
I also have
chickens and pigs. The
chickens just go where ever they want that they aren't fenced out of. The pig are in one pasture/mud zone but I hope to get them on rotational grazing this spring. The goats are moved through the 8 paddocks and the horses and cattle follow the goats. The goats eat down the brush and weeds and then the horses and cattle come in and graze down the shorter grasses which is infected with goat worms. I like to move the goats every 7 days but sometimes in the early summer they stay 10 days due to heavier growth of foliage. I actually have a moveable goat shelter. WE call it a the goatastoga. It looks a lot like a connestoga wagon from the pioneer days but has a floor in it made from wire mesh panels used to screen gravel. The poo and
pee just flows through The top is a billboard white tarp over heavy grey plastic conduit hoops. It has steps for the goats to climb to get in .The running gear were for a
hay wagon and I bought the running gear at an auction for 150 dollars. I move the goat-a-stoga with the goats. We did rent a trencher when we first moved hear and ran some hydrants out pretty far from our well, but I still have to run hoses for the goats automatic waterer. The horses shelter the trees most of the time. I live in north central Ohio and we have the goats on rotation from about early may to November. This year we were lucky and I was able to leave them on rotation until Thanksgiving.
Having 8 pastures has cut down on how much I need to worm the goats. It has basically eliminated the need to worm our horses. We have four horses. I wormed the calves when they were young and haven't had to worm them since and they are about 5 months old now. We have three calves now. PUt the last steer in the freezer in January of 2016.
We have an egg mobile but the chickens don't like it. So for now it is parked at the house for the winter. Maybe we will use it again next spring.
We ran about 40 head of goats this past summer that was with the kids from the spring. This coming year we may be running close to 60 head and that will probably be maxing out our pastures for goats. WE have Kiko, Kiko crosses and
dairy goats. The milk goats stay up by the house for ease of milking.
I used electro net for the goats for about two years. The horses were all kept in by electric tape. Moving the electro net got old so that is why I permanently fenced in all the pastures into rotational grazing paddocks. I truly love the permanent grazing areas I put in. Having 8 rotational paddocks allows me to give each paddock a much longer rest and really allows me to beat the worm cycle for the goats. And yes, I have a laneway and it is necessary for moving the animals around and it allows the horses to get to their water trough and salt without trapping them in a specific pasture.
good luck!
bonnie