Staying in Shape to Get in Shape

I'm not going to lie, this year hasn't been the best for my running. After getting off to a nice start in January, I've been dealing with a nagging hip flexor/quad issue, which while gradually getting better, seems to get a bit worse again for a day or two after any kind of stress workout. Very frustrating. Since Bella and I will be on vacation for 2 weeks in mid- to late-May (Boston and Ireland), I think my best approach now is to stay in decent enough shape this Spring and then ramp it up with no distractions when I get back home. It will be my Summer of Ben so to speak. I really, really want to run a great cross country race at club nationals in December and I also want to run really good 5K, 8K and 10Ks before that. I'm definitely doing the Meteor 10K in Michigan on April 2, but after that I'm guessing that I won't race again until June.  As always, subject to change.