No strap on main awning. How do I know the length I need?

You can make coffee on the stove, and people were living well long before the microwave was invented. Boondocking in an RV is not like living at home, but its a far cry from living in a tent. Before long you will adapt to life without a coffee maker and microwave and wonder why you were so worried about it. Thousands of others have done it and lived to laugh about it.