Wonder 05,
I found this thread on the Hybrid forum of
www.rv.net which was asking questions similar to yours this summer. What are the pros/cons of a Hybrid?
http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/29302432.cfm
It had over 40 replies. I didn't read it all but it might be worth going through if I were in your shoes.
Also with regards to a tow vehicle and the weight of a potential trailer, anything that tows around 5,000 pounds might be safe on paper but in reality would be borderline in my opinion. Hybrids are heavier than popups (I have owned two) and lighter that equivalent travel trailers. Most TT of any length will be pushing 4,000 pounds and that is not enough safety margin in my opinion. I started with a minivan with a factory installed tow package rated at 3,500 pounds and towed a 2,800 pound GVWR popup. The minivan was underpowered.
When you are on the interstate pulling at highway speeds, it's not the running at a constant rate (or even accelerating) that's the issue - it's how to control and stop when you are headed downhill in the rain at 65 mph at night when running bumper to bumper traffic (I75 between Lake City and Wildwood, anyone?) and some yahoo cuts in front of you and hits the brakes - that will pucker some internal organs as you think about the lives of your family in the car with you. (It happened often enough that I got a Suburban to tow my popup like amcc did and I am happy with my towing experience and cargo capacity it provides-plus having met amcc I can say she knows what she's talking about).
Your Expedition listed in a prior post has plenty of towing capacity but the Pilot and Volvo are marginal and I wouldn't drive them knowing now what I know about weights and towing capacity. I would pull my popup with them. And that's all I will say on this topic.
Bama Ed
PS - some advice will say online that you should tow at max 70-80% of the tow vehicle GVWR. And I agree with that. Plus as others said you will have the trailer and/or vehicle for years so kids grow up, they bring their friends, they all bring their bikes and bags for that two week trip, and you can be seriously overloaded. When it says TBD for a trailer's GVWR, that either means "it depends on how you equip it" or "it's so new we don't know yet". But any trailer you walk into in person is required by law to have a GVWR sticker/label in the camper and you should verify what it says. And if you get options (an extra AC unit, a slideout, the W/D), it all adds weight.
PPS - trailer salespeople have been known to lie about towing capacities also. Don't rely on their advice.
Trailer Customer: "Can I pull this 45 foot 5th wheel with my Mini Cooper?"
Sales Person: "Absolutely. It will be fine in the mountains."