the 2k RG is taking up to 4-5 days now to fill, so another 5k will take approx 2 weeks to fill.
I personally don't see a problem in running a 5k every 2 weeks...
my top 3 pref
1. st andy's- mod winds-tourny greens-back tee's
2.cabo-strong winds-forward tee's and champ greens
3. CCC-low winds-back tee's and tourny greens