Moog offset uca bushings

Hey guys as some of you know I'm rebuilding my front suspension and it's been brought to my attention I should use the k7103 offset bushings here is my question for a car that is gonna be used as a weekend warrior less than 5000 miles or so a year is it really necessary? I understand the alignment issue with the caster but is positive caster really all that important for a weekend warrior? I have already purchased my standard bushings. Next question I spend the extra 60 bucks and buy the moogs and use them will my standard cam bolts work or do I have to rebuy them also? I have already bought everthing I need! If I go with the moogs what else am I gonna have to rebuy?