A little white smoke at startup at this time of the year could just be condensation burning off. If either the intake manifold gasket or the head gasket is blown, you will experience a distinctive miss from those cylinders. If, after driving for a few miles, and you punch it, you will get a lot of white smoke out the tailpipe if the gaskets are blown. The pressure build-up on the hoses is quite normal, but something you may want to pursue. You may have some blockage in the system. Take a compression test on each cylinder to see if one or two cylinders are below normal from the rest of them. If it is, then you could possibly have a blown gasket.