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Actually the shorter the FL of the camera lens the more important the accuracy of your polar alignment also becomes. Sounds strange but its true. If you are even a bit off you will get field rotation in your shots. Guiding can't fix that either.
To get polar aligned well, you will need to do a decent amount of drift aligning but I think modern autoguiders can be used to speed up the process by showing the drift much faster than you can visually perceive it.
I spend about two hours getting the alignment right because rotation is really obvious with my FSQ and STL. In my case I use the super accurate Tak polar scope, TPoint and Automapper (which I am not saying you should) even then it takes me quite a while.
In short, yes you should get the guider but happily these days guiders are not expensive nor hard to use.
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