I missed two questions:
*Tents are common and some areas and not others, very very common in our area...
*I have been doing this 33 years, and was always instructed that the casket goes in the church foot first (when possible), out of the church foot first (when possible), and IN THE HEARSE FOOT FIRST ALWAYS. The set up at the grave and location is sometimes not known until we arrive, so the casket is not placed in the hearse in relation to anything at the grave. It just goes in foot first and when we get there we determine what route the casket needs to go for proper placement, and that is often dependent on other monuments, trees or any obstruction. We may get it out one way, go half way and change hands for proper placement.