Toyomoho is correct that in theory you should be able to remove and replace struts without an alignment. However in the real world it is possible to get the alignment out of tolerence by working just on the struts. I know this to be true as I have done it. The best advice I can give you is to do the strut work first and then immediately the alignment. But, if you have good tires now and you think it may be a while before you do the struts, then get the alignment to prevent excessive wear to the tires. Then as Toyomoho says, see how it drives and decide on another alignment. Locally alignments are $39 for the Camry and I don't mind spending that if I have done any work on the front end.