I don't know if you've had a chance to read my Perspectives article on this site, but here's a link:
http://www.jetcareers.com/perspectives/80-perspectives-mike-lewis-electrical-engineer.html
I went to ERAU as an electrical engineer, and I have to say, being an engineering student is a full-time endeavor.
I had the same plans when I was in high school; go to ERAU and double major in EE and Air Science. That changed to be just to major in EE and fly in the summer. After the first year, that changed again to just finish my engineering degree and use the summer to relax and recharge.
That's not to say you can't do it. Believe me, I had the passion, but the fact was that once I got the full load of engineering classes, I had to make the decision - was I going to focus on being a pilot or on being an engineer. As much as I wanted to do both, there's only so many hours in a day and so many days in a year, and you only have so much energy.
I always recommend that if you've never taking flight training before, you should take it as soon as possible, so I would recommend that part of option 1 no matter what. I can't tell you how many people I saw drop out after the first semester at ERAU when they realized that actually flying a plane was hard work and not like in Top Gun or in MS Flight Sim. Get your pilot's license as soon as you can to ensure it's something you really want to do.
Then, I'd pick a school based on your degree. Find a good aero engineering school. There are a lot of good AE schools out there, and some aren't what you would expect, such as Iowa State. They have one of the top ranked AE schools out there. But look at a school that's a good mix for you. Whether that be ERAU, Iowa State, Penn State, or some other school, make sure it's a good fit for you.
I think I know one guy who double majored in AE/AS, and he was on a 6-year track. He was pretty burned out, and what he basically did was do the AE degree and then do the AS degree.
Engineering is hard - I mean HARD. You take a 16-18 hour credit load, and that doesn't include laboratory time. The rule of thumb was for every hour you were in class, expect about 3 hours of homework outside of class. That means between work and homework, expect to be working/studying about 72 hours a week. That doesn't leave you a lot of time for flying.
I'll tell you for an engineering career, your school really doesn't matter. I'd take a guy with a 4.0 from Podunk State over a guy with a 2.8 from ERAU or Purdue any day.
So, what I would recommend is:
1. Go work on PPL and make sure aviation is really something you want to pursue.
2. Along those same lines, maybe see if there is some way to try out engineering. In the US, there are organizations like JETS (Junior Engineering Technical Society) that I got involved with to see if I would truly like engineering. Make sure that engineering degree is a good fit for you.
3. Find a good school for your degree. Whether that's ERAU or another school, find one that fits with you and can give you a good degree.
4. I'd say concentrate on your degree. If you can fly on the side or in the summer, great, but to be honest, I think you'll have your hands full just doing the engineering degree.
The thing that sold me on ERAU over other schools was the low student-to-faculty ratio, which was about 10-1 when I was there (as opposed to 50-1 or 100-1 for most large universities). The desire to fly on the side was a minor consideration. That said, there are days I wish I had gone to a large university for the full college experience - college football games, lots of girls, more options in classes and electives.
Find what's important to you. As I said, the student-to-faculty ratio was important to me. Think about what is important to you - the college size, college activities, classes offered, etc.
I hope this helps.