Hi Hmmm I know the feeling well but don’t give up.I found the way in from hints on forum about 18a and 26a see Chrise at 25. Depending on how old you are you may remember this from sixties/seventies.. The reference to fellow travellers helped in that across clues can finish 18a . I used this as a help to get the across solutions. In the downs 4 is an American state, 21 is an anagram. Hope this helps!
Once I got started with help from you guys I enjoyed it, thought the use of “fellow travelers” very clever.
Thanks Brockwell if you are still around made a dark stormy day ( waves crashing over the lighthouse which I can see from my window) much brighter.