Wheelock's isn't that great for Caesar actually. It blatantly adopts you to Ciceronian style, although for some quirky reason it teaches the Augustan forms where there is a contrast between Augustan and Ciceronian and does not go much into variations or syncopation. You will do well to take a look at alternative forms (
-is for
-es in third declension;
-ere for
-erunt in the perfect tense of verbs). Wheelock's also omits several common forms of the subjunctive and hardly mentions syncopation. I recommend you pick up a book like Moreland & Fleischer's and take a quick review while you brush up on a few new things. You can always just study this straight from a grammar book (like me

), but that is quite boring and likely to make you a subject of ridicule. Footnotes or a Loeb can also compensate for Wheelock's lackings, but some people like the independence of being able to read a passage without any help.
flebile nescio quid queritur lyra, flebile lingua murmurat exanimis, respondent flebile ripae