You are going to be climbing the steep side of the pass. The west side is considerably steeper than the east side. But it is a very good highway. You will have two lanes all the way up. Just stay right and take your time and you should have no problem. There are a number of pull outs along the way that you can pull over to the side and let the engine cool if needed.
That highway is a virtual RV pipeline both ways in the summer months.
Going down the east side is not bad. BUT. Shortly after passing the ski area watch for the snow shed over the highway. And mind the speed signs. There is a curve inside the snow shed and you need to be going the speed limit or less when you go thru. Other than that it will be easy all the way down.
If you truly want to avoid the climb, you could take US 64 south from Pagosa to US 285, then north to Alamosa. Quite a few extra miles, but no high passes to go over. About 170 miles to Alamosa that way vs about 90 over the pass.
And between Alamosa and Walsenburg you will cross La Veta pass. Not nearly as bad as Wolf Creek pass. And in this case the east side is the steeper side. The west side is pretty easy climb. Be careful of speed going down the east side though.