I have a little EIA, and here's three things to keep in mind:
Warm up! I always want to make the most of my ride time, so I tend to take off fast. Especially with a group ride when people act like it's a race, the pace begins and stays hard. But your lungs need 10 minutes to warm up and get the hang of the exercise before you take it up a notch. I've noticed that when I warm up properly, the wheeze doesn't happen.
I use a heart rate monitor, and I've noticed when the wheeze starts. If I don't warm up, the wheeze kicks in at 150. When I'm warm, I can take it up to 167-170 with nary a problem.
Do you have allergies? Pollen/mold/cottonwood tree fluff/grasses blooming can aggravate things; take a Claritin or Zyrtec. Particulate matter also matters. A lot of smog or dust in the air will mess with your lungs. Short of wearing a Michael Jackson-esque mask, just take it easy or notice that that's a factor and keep the effort moderate.
A very wise doctor once told me that you should use the least amount of medication to get the desired effect. In my completely nonmedical opinion, if you've never wheezed UNLESS you're working really hard or in a house with 15 cats and a bad cat allergy, you don't need a daily dose of asthma med. The albuterol works fine for me if I take it on a cold day before the ride or at the first hint of a wheeze.
Good luck!