... most of the GPS approaches at CAE want a
WAAS capable GPS, which my G430 isn't.

All four of the RNAV (GPS) approaches at CAE are flyable without WAAS. Having
WAAS would provide an electronic glideslope and allow you to use the lower
LNAV/VNAV or LPV minimums (which are all higher than the ILS minimums).
However, your choices to divert to someplace closer, and then land visually
when you had the chance, definitely seem to me like the right way to go in
this situation.

Barry