Tires -- total 2950 ratings or is that for each tire? If total, you're marginal for gross weight, but not disastrously so, as long as they're in good shape and you have them inflated to their max rating. Trailer has brakes, right?
A short single axle can work but may turn out to be less than ideal. A lot will depend on how far back your trailer axle is and how your tractor is weighted/balanced. You may not have enough room on a 10' deck to move the tractor back and forth to find the point where it balances and pulls well. Too heavy on the hitch and it will dive and bump a lot - annoying but workable as long as your van's supension is up to it and you keep your speed down. Tail heavy and it will fishtail at speed. Dangerous and tricky to get out of if you're not experienced in trailering. Limiting speed will help avoid but not eliminate that danger.
If it doesn't balance well pulling the tractor on, try backing it onto the trailer. Sometimes that's all that's needed.
If balance is a persistent problem, or you get right into it and want to haul heavier, faster or farther, you may want to look down the road at a longer, car-hauler type trailer with tandem axles. They'll typically have two 3500# axles but, more importantly, they'll have a longer deck. That coupled with the tandems will give you a lot more room to adjust and make for a better haul. It's overkill on the weight rating, I know, but it's a world of difference. It doesn't make much difference with mine whether it's empty, or has a car or a tractor on it, it pulls so well that I have to remind myself it's back there.
The pic is of my BN when I first brought it home. With the rear wheel weights on it, it ws likely a little heavier than your A would be without them, and only a little shorter, just to give you an idea of the fit. I'd rolled it further forward when I first dragged it on, then rolled it back by hand once I was hitched up, to get it where it balanced well, which was 4 or 5 feet back from the front edge.
If you're talking short trips and little if any highway speeds, you'll be fine with what you have if you can balance your load up so that it pulls safely.
Try with what you have first, chain it down securely and happy motoring!
P.S. How you coming with the wiring issues?