You could put some self liner in the bottom to sit to the eggs on if you are worried about them slipping about. Incubating them on their sides is fine just mark either side of the egg, one with an O and the other with an X. Turn at least 3 times per day but 5 would be better. As long as it's an odd number of times per day it's fine. This is so they don't sit in the same position for more than 1 night at a time as this is when there is the most time inbetween turns. Once you get your hygrometer in there you will get an idea of what water you will need in there for the humidity. Brinseas are good at holding the humidity so you probably won't need a lot. Do you have a guard cover for the water pot for when they are hatching?
York, how do you get in more than 10 eggs.