USB 2.0 4-port hub question

[x56h34]

I recently bought an Inland USB 2.0 4 port hub for my Dell laptop, and since I've never used a usb hub before I was wondering if anyone could shed some light on a few questions.

This hub is bus-powered, however there is a possibility of connecting an optional 5V power supply to feed it extra power. Should I look for a power supply in order to give this hub some extra juice, or is it really not that big of a deal to use it in bus-powered mode? Would a standard universal power supply, set to 5V with the right connector work in this case? Thanks.

[x56h34]

I have 3 USB devices which will be used.
A USB Mouse, an external hard drive (powered through an external power supply of its own), and a digital camera (powered by its internal 2AAA batteries).

The laptop has 2 USB ports. I guess I should plug the mouse into one laptop USB port directly, and the digital camera and hard drive into the USB hub, as the mouse needs power from the bus and the other two have their own external power sources. Would this be correct/smart way to do it until I find a suitable psu for the hub?

[x56h34]

The camera uses its own batteries for sure, as many times it shut down on me while connected to a usb port, due to low battery power (the LCD screen on the camera displays a "low battery" message as well).

[x56h34]

Thanks. Much appreciated! :-)

I'll still look for a suitable psu, but for now I'll have to use it as-is.