In th epast, with phones, i'd gotten to be pretty good at applying the dry film screen protectors, but nearly always had at least a couple of tiny bubbles I couldn't quite get out. With the larger, 7" display, I wanted to avoid that completely if possible.
I ended up ordering a wet-application protector for the first time, and was really nervous about putting it on. All I can say is, get one, read their instructions/view video/etc beforehand, and go to it. After putting it on - which took just a few minutes to get it aligned perfectly with absolutely no bubbles - I looked back on what had been, relative to application of dry models, ridiculously easy and (should have been) stress-free.
The one I used is by
ArmorSuit, but there's several well-reputed brands in the sticky thread (in the accessories sub-forum) to choose from.