I have a MacBook Pro that I take everywhere with me. I can't stand using a tablet. Had to borrow one last year and I couldn't stand it. And yes, I know the Surface also comes with a keyboard that you can use, but I've also tried it and would just prefer my laptop.
I use Google Drive to keep everything up to date. I can write at home or at work and always have the latest version.
Last year we had several write-ins on the other side of the state line, but they weren't so far away as to be prohibitive. There were a lot at the big neardowntown library and several in coffee shops. There was even a big crawl day. Meet in one place, stay there for X hours, go to another, stay there for X hours, and so on. I think they hit four or five places. I dropped off after the third, but it was right by my house, so super easy to get home.
The hardest part I have is that when I write fiction, I also have supporting documents. My novel itself was about 50,200 words, but between the two files I had for different reference/supprting information, I had at least another few thousand words onto that. But they don't count because they're not part of the story. But when my story is set in a real place and a fictional place and I have to sort out college schedules, floor plans of various houses, family and friend webs with four main characters, and the entire setup of a brand new society, it gets wordy and I do need to look back to what I've said before. There's just no way around it.