When trying to get it hot and keep it hot I tend to have better luck when I keep the wood chunks a little smaller as they light faster and burn hotter. I also tend to throw wood in between pizzas or between every other pizza. I am using a kettle pizza and I usually use a heaping chimney of charcoal in a metal basket in the back. Sometimes my temperatures might fall for a bit, but I use parchment paper when I am shaping my dough and it prevents the dough from sticking to the pizza stone. I just carefully pull the parchment paper out after the bottom has had a minute or two to cook. Worst case scenario the paper lights on fire.
With the one chimney of charcoal and the wood chunks I have successfully done garlic cheese bread and 6 pizzas all in one run. I tend to throw the cheese bread in first while the stone and grill are heating up. Makes a good appetizer and it doesn't stick to the stone when it is colder because the bread is already cooked. I simply add a crap load of cheese to it to make it that much better.
That is some nice pizza you made! It has been a big hit at my house and with everyone we have over because they can make it exactly how they want it. I shape the dough on the parchment paper before starting and when one pizza goes in the grill I tell whoever is on deck to make their pizza to go in.